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Quartz overgrowths on sandstone grains after clay formation, Nanushuk Group. Quartzose grains have overgrowths at points of low pressure (pore space) adjeacent to areas that were probably under high pressure (grain contacts). Overgrowths probably develop where clay coatings are absent. A polycrystalline quartz grain (upper left) has a pod of kaolinite growing on its surface. Sample 78ACh23, Kurupa anticline; magnification, 6.3 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 47A in U.S. Geological Survey Bulletin 1614. 1985.
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Colorado National Monument, Colorado. Eastern end of Kodels Canyon Fault on the west side of Fruita Canyon. There is no visible displacement except for considerable thinning of Wingate Sandstone. The high cliff of Wingate Sandstone on the left rests on slopes of Chinle Formation. The pinon and juniper-covered slope near the middle is Kayenta Formation resting on thinned Wingate Sandstone. Entrada Sandstone forms the low cliffs on the right. Circa 1950. Figure 32, U.S. Geological Survey Professional Paper 451.
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Glacier National Park, Montana. Altyn Limestone in the lower slopes of Appekunny Mountain, northeast of Many Glacier Hotel. This view is at the type locality of the formation, close to the site of the former settlement of Altyn. The Lewis overthrust is at the base of the cliffs, and the smooth slopes below are underlain by shale of Cretaceous age, which yields few outcrops. July 6,1901. Figure 2, U.S. Geological Survey Professional Paper 296.
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Tadzhikistan Earthquake 1949. Rising behind the village of Khait is Chokhran Mountain, down which a landslide thundered in the 1949 earthquake. The landslide scar and landslide are visible behind and to the left of Khait, respectively. Photo by R.L. Wesson. Page 12, Earthquake Information Bulletin, v.7, no.1.
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Guatemala Earthquake 1976. Bent rails at Puerto Barrios(?) wharf caused by faulting. Photo by A.F. Espinosa. Figure 2, page 8, Earthquake Information Bulletin, v.9, no.2.
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Hawke's Bay, New Zealand, Earthquake February 3, 1931. Fire-damaged buildings and cars in Napier. 1931. Page 17 (upper photo), Earthquake Information Bulletin, v.16. no.1.
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Shenandoah National Park, Virginia. Schistose greenstone along the Appalachian Trail at the base of Little Stony Man Cliffs. Here, a zone of breccia and schistose greenstone marks the boundary between the second and third flows above the base of the Catoctin Formation. The outcrop is approximately 3 feet high. Figure 7, U.S. Geological Survey Bulletin 1265.
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Coeur d'Alene District, Idaho. Contorted mud cracks in an argillitic bed in the lower part of the Wallace Formation. Figure 4, U.S. Geological Survey Professional Paper 478.
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Colorado National Monument, Colorado. Updragged Wingate Sandstone along Redlands Fault, looking northwest from a side road 1.5 miles southwest of the intersection of South Camp Road and South Broadway. The white "pimple" atop the cliff near the left skyline is Liberty Cap, an erosional remnant of the Wingate Sandstone, reachable via the Liberty Cap Trail. Here the Chinle Formation was largely squeezed out along the fault. 1976. Figure 38, U.S. Geological Survey Bulletin 1508.
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Red beds north of Table Mountain showing a cap of orange sandstone, probably Jelm Formation. Triassic age. Lying with erosional unconformity on the Chugwater red beds. Larimer County, Colorado. May 1922. Published in U.S. Geological Survey Professional Paper 149, Plate 22-B. 1927.
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Views of oyster reefs and sandstone of the Lewisville member of the Woodbine formation: Prominent mass of tuffaceous sandstone underlain by dark gray shaly clay and gray calcareous sand (locality 179) of the Lewisville member, at the downstream end of Hyatts Bluff, Red River 4.5 miles northwest of Ravenna. Fannin County, Texas. Plate 6-D, in U.S.Geological Survey Professional Paper 242. 1952.
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Hand sample of quartzite from the Revett Formation showing weathered rind (without secondary copper minerals) and rich sulfide ore a few centimetres below the surface. Sample provided through the courtesy of J.E. Harrison. n.d. Published as figure 15 in the U.S. Geological Survey Professional Paper 907-C. 1976.
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Glacier National Park, Montana. Intense soft-sediment deformation produced during pillow emplacement at Granite Park. The pillow in the lower right corner is entirely buried. The basal contact of the Purcell lava with the Snowslip Formation is, thus, locally very irregular. 1982. Figure 9-B, U.S. Geological Survey Open-File Report 85-543.
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Death Valley National Park, California. Red and white beds of the Furnace Creek Formation, viewed from Zabriskie Point. Panamint Range in the distance. 1940.
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Peru Earthquake October 3, 1974. Example of the extensive damage in La Molina District. This classroom and a laboratory building at the Agrarian University partially collapsed. 1974. Pages 6-7, Earthquake Information Bulletin, v.7, no.2.
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Death Valley National Park, California. Fractured cobble conglomerate in the Titus Canyon(?) Formation of Stock and Bode (1935). The fractures extend through the cobbles, and some cross from one cobble to another. They are oriented at right angles to the bedding, which approximately parallels the elongation of the cobbles. Displacements along the fractures are mostly less than a quarter of an inch. Circa 1960. Figure 41, U.S. Geological Survey Professional Paper 494-A.
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Shenandoah National Park, Virginia. Columnar jointing in greenstone. Large column along the Appalachian Trail about 200 feet south of Little Stony Man parking area. The column is cut by cleavage which dips east, away from the observer. The segment of the coluiai above each cleavage plane is offset westward from the segment beneath as a result of movement during formation of the cleavage. Column is approximately 2 feet in diameter. Figure 9 (right), U.S. Geological Survey Bulletin 1265.
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Alaska Earthquake March 27, 1964. Damage to houses from landslides in Turnagain Heights in Anchorage. Photo by R.A. Page. Pages 24-25 , Earthquake Information Bulletin, v.12, no.1.
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Death Valley National Park, California. Thin-bedded middle member of the Bonanza King Formation on the north side of Trail Canyon. View is north. This member, about 600 feet thick, forms a distinctive unit separating massive thick-bedded dolomite comprising the upper and lower members of the formation. Circa 1960. Figure 22, U.S. Geological Survey Professional Paper 494-A.
map background search result map search result map Quartz overgrowths on sandstone grains after clay formation, Nanushuk Group. Central North Slope, Alaska. No date. Example of the extensive damage in La Molina District. Peru Earthquake October 3, 1974. Bent rails at Puerto Barrios(?) wharf caused by faulting. Guatemala Earthquake 1976. Damage to houses from landslides in Turnagain Heights in Anchorage. Alaska Earthquake March 27, 1964. Fire-damaged buildings and cars in Napier. Hawke's Bay, New Zealand, Earthquake. 1931. Contorted mud cracks in an argillitic bed in the lower part of the Wallace Formation. Coeur d'Alene District, Idaho. No date. Thin-bedded middle member of the Bonanza King Formation on the north side of Trail Canyon. Death Valley National Park, California. Circa 1960. Fractured cobble conglomerate in the Titus Canyon(?) Formation of Stock and Bode (1935). Death Valley National Park, California. Circa 1960. Red beds north of Table Mountain showing a cap of orange sandstone, probably Jelm Formation. Larimer County, Colorado. 1922. Mammoth Cave National Park, Kentucky. Formation at the top of Frozen Niagara. Mammoth Cave National Park, Kentucky. 1925. Eastern end of Kodels Canyon Fault on the west side of Fruita Canyon. Colorado National Monument, Colorado. Circa 1950. Updragged Wingate Sandstone along Redlands Fault. Colorado National Monument, Colorado. 1976. Intense soft-sediment deformation at Granite Park. Glacier National Park, Montana. 1982. Schistose greenstone along the Appalachian Trail at the base of Little Stony Man Cliffs. Shenandoah National Park, Virginia. No date. Columnar jointing in greenstone. Shenandoah National Park, Virginia. No date. Views of oyster reefs and sandstone of the Lewisville member of the Woodbine formation. Fannin County, Texas. No date. Red and white beds of the Furnace Creek Formation, viewed from Zabriskie Point. Death Valley National Park, California. 1940. Altyn Limestone in the lower slopes of Appekunny Mountain. Glacier National Park, Montana. 1901. Eastern end of Kodels Canyon Fault on the west side of Fruita Canyon. Colorado National Monument, Colorado. Circa 1950. Updragged Wingate Sandstone along Redlands Fault. Colorado National Monument, Colorado. 1976. Mammoth Cave National Park, Kentucky. Formation at the top of Frozen Niagara. Mammoth Cave National Park, Kentucky. 1925. Views of oyster reefs and sandstone of the Lewisville member of the Woodbine formation. Fannin County, Texas. No date. Contorted mud cracks in an argillitic bed in the lower part of the Wallace Formation. Coeur d'Alene District, Idaho. No date. Red beds north of Table Mountain showing a cap of orange sandstone, probably Jelm Formation. Larimer County, Colorado. 1922. Intense soft-sediment deformation at Granite Park. Glacier National Park, Montana. 1982. Altyn Limestone in the lower slopes of Appekunny Mountain. Glacier National Park, Montana. 1901. Thin-bedded middle member of the Bonanza King Formation on the north side of Trail Canyon. Death Valley National Park, California. Circa 1960. Fractured cobble conglomerate in the Titus Canyon(?) Formation of Stock and Bode (1935). Death Valley National Park, California. Circa 1960. Red and white beds of the Furnace Creek Formation, viewed from Zabriskie Point. Death Valley National Park, California. 1940. Bent rails at Puerto Barrios(?) wharf caused by faulting. Guatemala Earthquake 1976. Example of the extensive damage in La Molina District. Peru Earthquake October 3, 1974. Quartz overgrowths on sandstone grains after clay formation, Nanushuk Group. Central North Slope, Alaska. No date. Damage to houses from landslides in Turnagain Heights in Anchorage. Alaska Earthquake March 27, 1964. Fire-damaged buildings and cars in Napier. Hawke's Bay, New Zealand, Earthquake. 1931.