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Album caption: Crossbedded Jefferson Dolostone, north of jeep trail northeast Keokirk Mountain. Published as figure 11B.
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Album caption: Polymictic conglomerate in the Red Lion Formation, south slope of Sheep Mountain. The angular clasts are tan, pink, and purple calcareous argillite in matrix of sandy carbonate that is slightly more resistant to weathering.
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Album caption: Unconformity between the Triassic Dinwoody Formation and basal conglomerate of the Lower Cretaceous Kootenai Formation. Location is north of Trapper Creek Road just west of confluence of Sucker Creek, 20 m above road level. Hammer is on unconformity, and plane of hammer is parallel to contact. Angular discordance is about 15 degrees; pebbles of Kootenai conglomerate fill local depressions of the unconformable surface developed in the Dinwoody. Published as figure 13.
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Album caption: Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Photomicrographs of chloritoid (Cd)-biotite (Bt) assemblages. A, Sample 338-1, with chlorite (Ch), garnet (Ga), and muscovite (Mu). Southwestern Massachusetts and adjacent Connecticut and New York. ca. 1966. Published as figure 16-A in U.S. Geological Survey. Professional paper 1113. 1981.
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Album caption: Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Photomicrographs of triply zoned plagioclase from (B0 sample 360-1 (cross-polarized light), showing the calcium-free rim in sharp contact with calcium-rich core. Compare with the profiles shown on figure 10. Southwestern Massachusetts and adjacent Connecticut and New York. ca. 1966. Published as figure 9-B in U.S. Geological Survey. Professional paper 1113. 1981.
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Abum caption: Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Photomicrographs of sample 191-1 showing chlorite (Ch) rimming magnetite (Mt) (plane-polarized light). A "ghost" crystal of chloritoid ("Cd") is also shown. The magnetite and chloritoid are interpreted to be relicts of an erlier episode of metamorphism. Southwestern Massachusetts and adjacent Connecticut and New York. ca. 1966. Published as figure 19 in U.S. Geological Survey. Professional paper 1113. 1981.
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Album caption: Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Photomicrographs showing (A) extreme habit adaptation of metamorphic plagioclase to the foliation surface of the rock, sample 423-1 (cross-polarized light); Southwestern Massachusetts and adjacent Connecticut and New York. c. 1966. Published as figure 11-A in U.S. Geological Survey. Professional paper 1113. 1981.
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Album caption: Biotite banding in Uphill Creek Granodiorite, rock basin south of Tendoy Lake. There is no size gradation in biotite from mafic to leucocratic layers. Published as figure 29.
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Abum caption: Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Photomicrographs of tourmaline. B, A mantle of tourmaline showing inclusion of a preexisting metamorphic foliation; sample 102-2 (plane-polarized light). Southwestern Massachusetts and adjacent Connecticut and New York. ca. 1966. Published as figure 16-A in U.S. Geological Survey. Professional paper 1113. 1981.
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Album caption: The high country of the east Pioneer Mountains that is underlain by the batholithic rocks. View is south from summit of 10,352-foot peak. Mount Tahepia (10,473 ft) is in right background; northeast part of peak was destroyed by prehistorical landslide (slide material visible in left center of picture). The two high peaks on the horizon are Tweedy Mountain (11,154 ft) on the left and Torrey Mountain (11,147 ft) on the right, the highest peaks in the Pioneer Mountains. Published as figure 18.
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Album caption: Large rounded boulders on ridge top, southwest of divide (visible in background), interpreted as Tertiary stream gravel. Boulders are newly exclusively Proterozoic Y quartzite of types of fund [sic] east of the Fourth of July fault. Man in distance indicates scale. Published as figure 16.
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Album caption: Jefferson Dolostone; interbedded light creamy white and steel-gray dolostone. Location is south slope of 8,1938-foot peak west of Lion Mountain. Published as figure 11A.
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Album caption: Conglomerate in the Colorado Group, interpreted as gravel bar; pen just above middle of picture is shown for scale. Location is near 6,690-foot knob, Lelo (Louie Lowe) Basin. Large elongate cobble in lower right corner is a sheared clast of volcanic ash typically found as beds in the formation. Most clasts are chert and quartzite typical of the upper Paleozoic formations of the area. Published as figure 14B.
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Album caption: Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Photomicrographs of tourmaline. A, Zone tourmaline characteristic of tourmaline found in the area; a light-yellow core having rounded (detrital?) outline is mantled by a dark-bluish-gray overgrowth; sample 509-1 (plane-polarized light). Southwestern Massachusetts and adjacent Connecticut and New York. ca. 1966. Published as figure 13-A in U.S. Geological Survey. Professional paper 1113. 1981.
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Album caption: Conglomerate, correlated with the Beaverhead Conglomerate, east of Interstate 15 south of Melrose, center sec. 23, T. 3S., R. 9W., Earls Gulch quadrangle. Nearly all the cobbles are pink and red feldspathic quartzite typical of that of the Proterozoic Y sequence of Morrison hill klippe. A few Paleozoic limestone cobbles (one is next to the hammer) and rare pale-green volcanic ash pebbles (not visible on photograph) exist. Published as figure 23
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Abum caption: Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Photomicrographs of chloritoid (Ch)-biotite (Bt) assemblages. D, Sample 509-1A, with garnet (Ga) and chlorite (Ch). All, plane-polarized light, Southwestern Massachusetts and adjacent Connecticut and New York. ca. 1966. Published as figure 16-D in U.S. Geological Survey. Professional paper 1113. 1981.
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Album caption: Dark-gray fissile shale in the Colorado Group forming a large flame structure; note that adjacent sandstone beds have been turned to upright position but that the overlying sandstone bed continues with out interruption across the structure. Palynomorphs described in test are found in shale in foreground. Location is ridge south of Browns Creek, just east of National Forest boundary. Published as figure 14C.
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Album caption: Discoid mafic inclusions paralleling contact between the Grayling Lake Granite (matrix of the discoids) and its porphyritic border phase. Location is base of cliffs west of Keokirk Mountain. Published as figure 30.
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Album caption: Pseudomorphs of garnet or staurolite in a micaceous matrix, lower member of the Silver Hill Formation, east side of structural dome at Hecla, above swamps of Sappington Creek. Published as figure 31.
map background search result map search result map Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa. 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Trilobite tracks, lower member of Silver Hill Formation, north slope of Sheep Mountain. Beaverhead County, Montana. nd. Polymictic conglomerate in the Red Lion Formation, south slope of Sheep Mountain. Beaverhead County, Montana. nd. Jefferson Dolostone; interbedded light creamy white and steel-gray dolostone. Beaverhead County, Montana. nd. Crossbedded Jefferson Dolostone northeast Keokirk Mountain. Beaverhead County, Montana. no date. Unconformity between the Triassic Dinwoody Formation and basal conglomerate of the Lower Cretaceous Kootenai Formation. Beaverhead County, Montana. nd. Conglomerate in the Colorado Group, interpreted as gravel bar; pen just above middle of picture is shown for scale. Beaverhead County, Montana. nd. Dark-gray fissile shale in the Colorado Group forming a large flame structure; note that adjacent sandstone beds have been turned to upright position but that the overlying sandstone bed continues with out interruption across the structure. Beaverhead County, Montana. nd. Large rounded boulders on ridge top, southwest of divide (visible in background), interpreted as Tertiary stream gravel. Beaverhead County, Montana. nd. The high country of the east Pioneer Mountains that is underlain by the batholithic rocks. Beaverhead County, Montana. nd. Conglomerate, correlated with the Beaverhead Conglomerate, east of Interstate 15 south of Melrose, center sec. 23, T. 3S., R. 9W., Earls Gulch quadrangle. Beaverhead County, Montana. nd. Biotite banding in Uphill Creek Granodiorite, rock basin south of Tendoy Lake. Beaverhead County, Montana. nd. Discoid mafic inclusions paralleling contact between the Grayling Lake Granite (matrix of the discoids) and its porphyritic border phase. Beaverhead County, Montana. nd. Pseudomorphs of garnet or staurolite in a micaceous matrix, lower member of the Silver Hill Formation, east side of structural dome at Hecla, above swamps of Sappington Creek. Beaverhead County, Montana. nd. Trilobite tracks, lower member of Silver Hill Formation, north slope of Sheep Mountain. Beaverhead County, Montana. nd. Polymictic conglomerate in the Red Lion Formation, south slope of Sheep Mountain. Beaverhead County, Montana. nd. Jefferson Dolostone; interbedded light creamy white and steel-gray dolostone. Beaverhead County, Montana. nd. Crossbedded Jefferson Dolostone northeast Keokirk Mountain. Beaverhead County, Montana. no date. Unconformity between the Triassic Dinwoody Formation and basal conglomerate of the Lower Cretaceous Kootenai Formation. Beaverhead County, Montana. nd. Conglomerate in the Colorado Group, interpreted as gravel bar; pen just above middle of picture is shown for scale. Beaverhead County, Montana. nd. Dark-gray fissile shale in the Colorado Group forming a large flame structure; note that adjacent sandstone beds have been turned to upright position but that the overlying sandstone bed continues with out interruption across the structure. Beaverhead County, Montana. nd. Large rounded boulders on ridge top, southwest of divide (visible in background), interpreted as Tertiary stream gravel. Beaverhead County, Montana. nd. The high country of the east Pioneer Mountains that is underlain by the batholithic rocks. Beaverhead County, Montana. nd. Conglomerate, correlated with the Beaverhead Conglomerate, east of Interstate 15 south of Melrose, center sec. 23, T. 3S., R. 9W., Earls Gulch quadrangle. Beaverhead County, Montana. nd. Biotite banding in Uphill Creek Granodiorite, rock basin south of Tendoy Lake. Beaverhead County, Montana. nd. Discoid mafic inclusions paralleling contact between the Grayling Lake Granite (matrix of the discoids) and its porphyritic border phase. Beaverhead County, Montana. nd. Pseudomorphs of garnet or staurolite in a micaceous matrix, lower member of the Silver Hill Formation, east side of structural dome at Hecla, above swamps of Sappington Creek. Beaverhead County, Montana. nd. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa. 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966. Metamorphic mineral assemblages of slightly calcic pelitic rocks in and around the Taconic allochton. Southwestern Massachusetts and adjacent Connecticut and New York. circa 1966.