exact locality not clear; from(more...) eastern side of ridge just west of a north-flowing glacier. Joint faces at right angle to bedding covered with white quartz
white quartzite, slight greeni(more...)sh tint, medium -grained, with 1/2'' quartz vein; 2 pieces
Principal rock type is quartzi(more...)te, medium-coarse grained, color varies from white to reddish-brown, chief color is whitish-green. Amount of impurities varies considerably; most of quartzite is fairly pure. original structures well preserved. bedding is easily seen. Some well developed cross bedding. Beds average thickness hard to determine. Beds from 10' to 1', while alternating light and dark beds are present from 0.25-1'' thick. Conglomerate lenses. Ripple marks present but few. Some slate beds to 1' thick. Good platy cleavage developed. Color varies from black to greenish black. Beds are intensely folded, fold axes ~ N-S. Dip of beds 90° or more in places, much less in others. Minor folding as well on fold limbs. Fractures - very well developed E-W system. Spacing 3-5'. White quartz veins.
Principal rock type is quartzi(more...)te, medium-coarse grained, color varies from white to reddish-brown, chief color is whitish-green. Amount of impurities varies considerably; most of quartzite is fairly pure. original structures well preserved. bedding is easily seen. Some well developed cross bedding. Beds average thickness hard to determine. Beds from 10' to 1', while alternating light and dark beds are present from 0.25-1'' thick. Conglomerate lenses. Ripple marks present but few. Some slate beds to 1' thick. Good platy cleavage developed. Color varies from black to greenish black. Beds are intensely folded, fold axes ~ N-S. Dip of beds 90° or more in places, much less in others. Minor folding as well on fold limbs. Fractures - very well developed E-W system. Spacing 3-5'. White quartz veins.
Principal rock type is quartzi(more...)te, medium-coarse grained, color varies from white to reddish-brown, chief color is whitish-green. Amount of impurities varies considerably; most of quartzite is fairly pure. original structures well preserved. bedding is easily seen. Some well developed cross bedding. Beds average thickness hard to determine. Beds from 10' to 1', while alternating light and dark beds are present from 0.25-1'' thick. Conglomerate lenses. Ripple marks present but few. Some slate beds to 1' thick. Good platy cleavage developed. Color varies from black to greenish black. Beds are intensely folded, fold axes ~ N-S. Dip of beds 90° or more in places, much less in others. Minor folding as well on fold limbs. Fractures - very well developed E-W system. Spacing 3-5'. White quartz veins.
light green-buff medium -grai(more...)ned quartzite with serpentine and slickensides
Quartzite. On W side of outcro(more...)p fractures strike ~ N80E. Regular spaced from 3-5'. Dip vertical. Cross bedding on some strata. E side of nunatak quite massive; bedding indistinct. Very dense, hard, fused rock with many quartz veins. No gross bedding visible. Country rock is clean, white quartzite. many slickensides. Western side is impure, quite ferruginous, quartzite. Bedding visible. N25°E, ~ 80°W. Some slickensides, but no fault planes observed.
medium to coarse-grained ferr(more...)uginous quartzite, slightly micaceous; 3 pieces
Quartzite. On W side of outcro(more...)p fractures strike ~ N80E. Regular spaced from 3-5'. Dip vertical. Cross bedding on some strata. E side of nunatak quite massive; bedding indistinct. Very dense, hard, fused rock with many quartz veins. ~N30°E, vertical. No gross bedding visible. Country rock is clean, white quartzite. many slickensides. Western side is impure, quite ferruginous, quartzite. Bedding visible. N25°E, ~ 80°W. Some slickensides, but no fault planes observed.
Nunatak NW of Olsen Peak. Gene(more...)ral color of outcrop from distance is brown-black; brown color due to weathering. Principal rock type is metagraywacke or impure quartzite, mostly fine-medium grained. Predominantly dark gray. Bottom 10' rather massive ferruginous quartzite. On top of this was ~ 6' slate. 30' impure quartzite with relict sedimentary structures, beds 1-3' thick. Upper 30-40' is real impure quartzite or metagraywacke. Numerous veins of quartz, epidote and serpentine and possibly apatite. Hematite and goethite weathering. Bedding plane slickensides occur in great profusion. Lineation is nearly vertical. Well-developed joint system, spacing fairly regular, from 2-5', strike ~ E-W.
dark gray fine-grained impure (more...)quartzite with slickensides; 2 pieces
Nunatak NW of Olsen Peak. Gene(more...)ral color of outcrop from distance is brown-black; brown color due to weathering. Principal rock type is metagraywacke or impure quartzite, mostly fine-medium grained. Predominantly dark gray. Bottom 10' rather massive ferruginous quartzite. On top of this was ~ 6' slate. 30' impure quartzite with relict sedimentary structures, beds 1-3' thick. Upper 30-40' is real impure quartzite or metagraywacke. Numerous veins of quartz, epidote and serpentine and possibly apatite. Hematite and goethite weathering. Bedding plane slickensides occur in great profusion. Lineation is nearly vertical. Well-developed joint system, spacing fairly regular, from 2-5', strike ~ E-W.
dark gray fine-grained impure (more...)quartzite with slickensides
Nunatak NW of Olsen Peak. Gene(more...)ral color of outcrop from distance is brown-black; brown color due to weathering. Principal rock type is metagraywacke or impure quartzite, mostly fine-medium grained. Predominantly dark gray. Bottom 10' rather massive ferruginous quartzite. On top of this was ~ 6' slate. 30' impure quartzite with relict sedimentary structures, beds 1-3' thick. Upper 30-40' is real impure quartzite or metagraywacke. Numerous veins of quartz, epidote and serpentine and possibly apatite. Hematite and goethite weathering. Bedding plane slickensides occur in great profusion. Lineation is nearly vertical. Well-developed joint system, spacing fairly regular, from 2-5', strike ~ E-W.
interbedded light and dark qua(more...)rtzite; light quartzite is light gray, weathering to reddish brown, medium -grained. Dark is dark gray to black, very fine-grained, almost slaty.
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark.
dark gray, dense, fine-grained(more...) quartzite, weathers reddish brown
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite (this sample), weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark.
dark gray, dense, fine-grained(more...) quartzite, shows laminations on weathered surface
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated (this sample); interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark.
interlaminated light and dark (more...)quartzite. Light is coarser than dark, somewhat lenticular; dark appears slaty. Laminae up to 1 cm. 2 pieces
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites (this sample); fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark.
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red (this sample); interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark.
interlaminated, light and dark(more...) gray, fine to medium -grained quartzite. Light gray laminae weather to a buff color; 2 pieces
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite (this sample); quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark.
interlaminated fine to medium (more...)-grained dark gray quartzite, some laminae buff-colored. 2 pieces
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained (this sample); quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark.
finely laminated, fine-grained(more...), dark gray, silty quartzite
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained (this sample); quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark.
dark gray fine-grained quartzi(more...)te with unknown yellowish mineral coating
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating (this sample); flat pebble conglomerate; quartzite, interbedded light and dark.
flat pebble conglomerate with (more...)gray fine to medium -grained quartzite matrix; pebbles are dark gray fine-grained quartzite or slate; 2 pieces
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate (this sample); quartzite, interbedded light and dark.
flat pebble conglomerate with (more...)gray medium -grained quartzite matrix; pebbles are dark gray fine-grained quartzite or slate
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate (this sample); quartzite, interbedded light and dark.
interbedded fine-grained light(more...) and dark gray silty quartzite (argillite); light beds are lenticular
A lot of rock exposed, but not(more...) possible to get good measured section - structure is very complicated with very intense folding; slaty cleavage very well developed and obscures other features; drag folding; evidence of faulting - slickensides; much of slope is covered with rubble. Series of folds with axes ~ N20°W; limbs are generally steep, usually dipping at least 70°. Well developed fractures. White quartz veins. Lithologies: impure quartzite or subgraywacke; dark gray quartzite; interbedded light and dark quartzite; dark gray quartzite, weathers to brick red color; dense quartzite, finely laminated; interbedded light and dark quartzites; fairly massive quartzite, gray, weathers red; interlaminated red and gray quartzite; quartzite, fine and medium grained; quartzite, fine grained; quartzite with unknown mineral coating; flat pebble conglomerate; quartzite, interbedded light and dark (this sample).
banded dark gray and brown wea(more...)thering, banded light and medium gray fresh, thin bedded, very fine-grained quartzite (sandstone)
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 13, a sequence of thin bedded quartzite-graywackes and quartzitic slates.
banded dark gray and brown wea(more...)thering, banded light and medium gray fresh, very fine-grained quartzite (sandstone)
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 13, a sequence of thin bedded quartzite-graywackes and quartzitic slates.
banded dark gray and brown wea(more...)thering, banded light and medium gray fresh, thin bedded, very fine-grained quartzite (sandstone); 2 pieces
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 13, a sequence of thin bedded quartzite-graywackes and quartzitic slates.
medium to dark gray fresh, ma(more...)ssive, well-indurated, fine to medium -grained quartzite (sandstone), weathers to a reddish-brown color
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate.
buff-gray weathering, light gr(more...)ay fresh, massive fine quartzite (conglomerate)with rounded, dark gray slate pebbles scattered throughout it; pebbles range up to 1'' in diameter, fairly well-rounded and tend to be disc-like in shape; 2 pieces
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 11, quartzite with intraformational conglomerate at base of unit.
banded dark gray and brown wea(more...)thering, banded light and medium gray fresh, thin bedded, very fine-grained quartzite (sandstone); 2 pieces
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 10, quartzite-graywacke.
banded dark gray and brown wea(more...)thering, banded light and medium gray fresh, thin bedded, very fine-grained quartzite (sandstone)
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 9, quartzite-graywacke., occasional thin shaly layers.
medium gray (weathered and fr(more...)esh), thin bedded quartzite (siltstone); bedding not very distinct; 7 pieces
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 8, slaty quartzite or quartzitic slate-shale.
medium gray with reddish tint(more...) weathering, gray fresh, massive, medium -grained quartzite (sandstone); 2 pieces
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 7, quartzite-graywacke.
medium gray weathering, mediu(more...)m to light gray fresh, massive, fine-grained quartzite (sandstone) with flat, dark gray pebbles up to 1.5'' in diameter; pebbles are well oriented and occur in layers; 2 pieces
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 7, quartzite-graywacke.
medium gray weathering, mediu(more...)m to light gray fresh, massive, fine-grained quartzite (sandstone); numerous veins of cream colored minerals: calcite throughout rock; 2 pieces
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 5, quartzite-graywacke.
medium gray weathering, light(more...) gray fresh, massive, fine-grained quartzite (sandstone) with flat, dark gray pebbles up to 1.5'' in diameter; pebbles are well oriented and occur in layers
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 3, quartzite-graywacke; common flat pebble conglomerate beds.
banded brown and gray weatheri(more...)ng, light and medium gray fresh, banded (bands 1-25 mm thick), fine-grained quartzite - sandstone (light gray portion) and siltstone (dark gray beds)
Measured section on W side of (more...)Mt. Ulmer. Structure very complicated. Over distance of 100' the strata varied in dip over 30°. Most beds dip into mountain, while some were nearly or completely vertical; none were overturned. Slate-shale, quartzite-graywacke, intraformational conglomerate. Sample from Unit 2, quartzite-graywacke.
light greenish-gray, medium -g(more...)rained quartzite, well-indurated, quartz veins (up to 1 cm wide); 2 pieces
Three lithologic units of stri(more...)kingly contrasting colors; lowest unit is light colored, middle one dark, and upper one again light. Upper unit is a great thickness of fairly uniform, light gray to buff quartzite (this sample). Middle unit is dark gray to black slate, almost a phyllite, which has in it scattered pebbles of mostly quartz. Lower unit is a very thick, fairly uniform, gray quartzite.
light greenish-gray medium -gr(more...)ained quartzite, well-indurated, quartz veins (up to 1 cm wide); 2 pieces
Three lithologic units of stri(more...)kingly contrasting colors; lowest unit is light colored, middle one dark, and upper one again light. Upper unit is a great thickness of fairly uniform, light gray to buff quartzite (this sample). Middle unit is dark gray to black slate, almost a phyllite, which has in it scattered pebbles of mostly quartz. Lower unit is a very thick, fairly uniform, gray quartzite.
dark gray slate; 1 large piece(more...) and 10 fragments
Three lithologic units of stri(more...)kingly contrasting colors; lowest unit is light colored, middle one dark, and upper one again light. Upper unit is a great thickness of fairly uniform, light gray to buff quartzite. Middle unit is dark gray to black slate, almost a phyllite, which has in it scattered pebbles of mostly quartz (this sample). Lower unit is a very thick, fairly uniform, gray quartzite.
Three lithologic units of stri(more...)kingly contrasting colors; lowest unit is light colored, middle one dark, and upper one again light. Upper unit is a great thickness of fairly uniform, light gray to buff quartzite. Middle unit is dark gray to black slate, almost a phyllite, which has in it scattered pebbles of mostly quartz (this sample). Lower unit is a very thick, fairly uniform, gray quartzite.
greenish-gray medium -grained (more...)quartzite, weathers reddish-brown; 2 pieces
Three lithologic units of stri(more...)kingly contrasting colors; lowest unit is light colored, middle one dark, and upper one again light. Upper unit is a great thickness of fairly uniform, light gray to buff quartzite. Middle unit is dark gray to black slate, almost a phyllite, which has in it scattered pebbles of mostly quartz. Lower unit is a very thick, fairly uniform, gray quartzite (this sample).
light gray, medium -grained, f(more...)airly pure quartzite, weathers to light olive gray. Part of sample is grayish red quartzite, sharp boundary with light quartzite. Minor slickensides; 4 pieces
Small nunatak near west side o(more...)f Newcomer Glacier. Quartzite, fine to medium grained, quite light in color, ranging from off white to light flesh color on fresh fracture. Generally thin bedding, 1-3'', though some variation on either side of this. Whole outcrop is fractured in N70°E direction, spacing 1-2'. Iron-rich solution must have passed through these fractures - quartzite is colored quite red on either side of most of them. Some specular hematite developed on fracture surfaces. N15°W, 55°W. Common bedding plane slickensides. Numerous white quartz veins randomly oriented, ranging from 1-3'' wide.
very light gray fine-grained q(more...)uartzite, showing slight reddish tint on weathering. 5 pieces
Small nunatak near west side o(more...)f Newcomer Glacier. Quartzite, fine to medium grained, quite light in color, ranging from off white to light flesh color on fresh fracture. Generally thin bedding, 1-3'', though some variation on either side of this. Whole outcrop is fractured in N70°E direction, spacing 1-2'. Iron-rich solution must have passed through these fractures - quartzite is colored quite red on either side of most of them. Some specular hematite developed on fracture surfaces. N15°W, 55°W. Common bedding plane slickensides. Numerous white quartz veins randomly oriented, ranging from 1-3'' wide. What appears to be bedding has been parted by weathering solutions and a slight fold in the specimen has given way to several loose arcuate pieces.
grayish-pink medium to coarse(more...)-grained quartzite, weathers pale reddish brown. Dark yellowish orange on two slickensided surfaces suggests a secondary mineral or iron staining; 5 pieces
Small nunatak near west side o(more...)f Newcomer Glacier. Quartzite, fine to medium grained, quite light in color, ranging from off white to light flesh color on fresh fracture. Generally thin bedding, 1-3'', though some variation on either side of this. Whole outcrop is fractured in N70°E direction, spacing 1-2'. Iron-rich solution must have passed through these fractures - quartzite is colored quite red on either side of most of them. Some specular hematite developed on fracture surfaces. N15°W, 55°W. Common bedding plane slickensides. Numerous white quartz veins randomly oriented, ranging from 1-3'' wide. What appears to be bedding has been parted by weathering solutions and a slight fold in the specimen has given way to several loose arcuate pieces.
grayish yellow green medium -g(more...)rained quartzite, weathers grayish red. 6 pieces
Somewhat impure quartzite, fin(more...)e to medium grained, greenish-gray fresh, reddish and pinkish brown weathered. Bedding generally thin, perhaps 1'' though there are thicker units up to 1' thick. Cross bedding very common; some ripple marks; bedding plane slickensides common. ~N10°W, vertical to slightly overturned; cross bedding indicates top of beds to W. White quartz veins very common. Weathering along bedding planes produces slight parting.
grayish green medium -grained (more...)cross-bedded quartzite; 3 pieces
Somewhat impure quartzite, fin(more...)e to medium grained, greenish-gray fresh, reddish and pinkish brown weathered. Bedding generally thin, perhaps 1'' though there are thicker units up to 1' thick. Cross bedding very common; some ripple marks; bedding plane slickensides common. ~N10°W, vertical to slightly overturned; cross bedding indicates top of beds to W. White quartz veins very common. Weathering along bedding planes produces slight parting.
white quartz with grayish-gree(more...)n mineral (chlorite?) vein filling
Somewhat impure quartzite, fin(more...)e to medium grained, greenish-gray fresh, reddish and pinkish brown weathered. Bedding generally thin, perhaps 1'' though there are thicker units up to 1' thick. Cross bedding very common; some ripple marks; bedding plane slickensides common. ~N10°W, vertical to slightly overturned; cross bedding indicates top of beds to W. White quartz veins very common. Weathering along bedding planes produces slight parting.
white quartz (and chlorite?) v(more...)ein filling; 2 pieces
Somewhat impure quartzite, fin(more...)e to medium grained, greenish-gray fresh, reddish and pinkish brown weathered. Bedding generally thin, perhaps 1'' though there are thicker units up to 1' thick. Cross bedding very common; some ripple marks; bedding plane slickensides common. ~N10°W, vertical to slightly overturned; cross bedding indicates top of beds to W. White quartz veins very common. Weathering along bedding planes produces slight parting.
dark gray fine-grained quartzi(more...)te, slickensided; 2 pieces
Arete extending westward from (more...)base of Mt. Barden. Principal rock is quartzite. Over this large exposure the varieties are numerous. Some of the main types: quartzite, light gray-green; quartzite, medium gray, thin-medium bedded; quartzite, thick bedded (2-4'), light gray. Microstructures are common, especially small (drag?) folds and faults with small amount of offset. Bedding plane slickensides quite common. Quartz veins both cross cutting and parallel to bedding, thickness varies 1/8''-6''. A few rare beds, ~ 1' thick, of finer material which is now phyllite. these are fissile, dark green-black; drag folding well developed. N15°W, 80°E to vertical; top of beds to E. Many bedding surfaces show ripple marks. Lighter colored rock overlies this quartzite unit.
light grayish-green medium -gr(more...)ained quartzite, quartz veins and microfolds common
Arete extending westward from (more...)base of Mt. Barden. Principal rock is quartzite. Over this large exposure the varieties are numerous. Some of the main types: quartzite, light gray-green; quartzite, medium gray, thin-medium bedded; quartzite, thick bedded (2-4'), light gray. Microstructures are common, especially small (drag?) folds and faults with small amount of offset. Bedding plane slickensides quite common. Quartz veins both cross cutting and parallel to bedding, thickness varies 1/8''-6''. A few rare beds, ~ 1' thick, of finer material which is now phyllite. these are fissile, dark green-black; drag folding well developed. N15°W, 80°E to vertical; top of beds to E. Many bedding surfaces show ripple marks. Lighter colored rock overlies this quartzite unit.
grayish-green medium -grained (more...)cross-bedded quartzite, weathers grayish red; 3 pieces
W ends of ridge extending W fr(more...)om ''Goose Peak'', west end of nunataks west of Mount Dawson. From any distance this outcrop appears dark. Up close, strata not of uniform color. Three major types of quartzite. Most common (this sample) is dark gray, weathers reddish-brown. bedding thickness varies considerably, but most common 6''-1'. Cross bedding very well developed. Quartz veins vary in number and thickness. Second most common type is quite pure light gray-green quartzite, fine-medium grained. Cross bedding not very common; most beds are parallel. Quartz veins vary in number from unit to unit. Third and least common type is transitional between the above two types; medium gray, weathers dirty gray-green-brown. Cross bedding common.
fairly pure grayish green fine(more...) to medium grained quartzite; 2 pieces
W ends of ridge extending W fr(more...)om ''Goose Peak'', west end of nunataks west of Mount Dawson. From any distance this outcrop appears dark. Up close, strata not of uniform color. Three major types of quartzite. Most common is dark gray, weathers reddish-brown. bedding thickness varies considerably, but most common 6''-1'. Cross bedding very well developed. Quartz veins vary in number and thickness. Second most common type (this sample) is quite pure light gray-green quartzite, fine-medium grained. Cross bedding not very common; most beds are parallel. Quartz veins vary in number from unit to unit. Third and least common type is transitional between the above two types; medium gray, weathers dirty gray-green-brown. Cross bedding common.
grayish green medium -grained (more...)quartzite; 3 pieces
W ends of ridge extending W fr(more...)om ''Goose Peak'', west end of nunataks west of Mount Dawson. From any distance this outcrop appears dark. Up close, strata not of uniform color. Three major types of quartzite. Most common is dark gray, weathers reddish-brown. bedding thickness varies considerably, but most common 6''-1'. Cross bedding very well developed. Quartz veins vary in number and thickness. Second most common type is quite pure light gray-green quartzite, fine-medium grained. Cross bedding not very common; most beds are parallel. Quartz veins vary in number from unit to unit. Third and least common type (this sample) is transitional between the above two types; medium gray, weathers dirty gray-green-brown. Cross bedding common. N20°W, 45-60°E.
grayish green medium -grained (more...)quartzite, weathers grayish red; 2 pieces
Eastern and western end of nun(more...)atak are dark quartzite; middle part is light quartzite. Eastern of two contacts is conformable. Strike of both units is N10°W, 80° to vertical; evidence of cross bedding shows dark unit underlies light. Did not get to western of the two contacts. Dark quartzite resembles dark quartzite from other locales. There are some differences. Most common rock type is medium-coarse grained, gray variety (this sample), weathers to dirty brick red; comes in all bed thicknesses; most common is 1-2''. Fairly common green quartzite, usually shot through with white quartz veins; bedding in all thicknesses. Third distinctive type, though rare, is medium-coarse grained, light colored quartzite spotted like a leopard.
