Skip to main content
Advanced Search

Filters: Tags: Pierce, K.L. Collection (X)

37 results (178ms)   

View Results as: JSON ATOM CSV
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Striations and glacial polish on breccia clase in Eocene bedrock at Prospect Peak (altitude 2,930 m or 9,525 ft.) in the northern part of the Washburn Range. Note how striations and polish round upper edge of boulder and then disappear. About 10 similarly striated clasts protruding from the bedrock were found on the peak, each polished and striated on the southeast side, inidcating flow to the northwest (to the upper right). Photograph by Cliff Montagne. Wyoming, ca. 1968. No index card. Published as Figure 26 in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: Pond and large erratics in moraines of late Pinedale age near Junction Butte. View is to the southeaset; glacier source mostly out of sight in the left distance. Photographs by W.R. Keefer. Wyoming, ca. 1968. No index card.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Pond and large erratics in moraines of late Pinedale age near Junction Butte. View is to the southeast; glacier source mostly out of sight in the left distance. Photograph by W.R. Keefer. Wyoming, ca. 1968. No index card. Published as Figure 42 in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Directional glacial-scour features. Photomicrograph of striations rounding a protuberance, summit area of Mount Washburn. Polish on upflow side of corner. The hackly area just left of center is part of a friction crack. Wyoming, ca. 1968. No index card. Published as Figure 7-C in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Aerial photograph showing glacial features on the west side of the Gallatin Range. Ice flowing through passes along the Gallatin Range divide (open arrows) combined with glaciers from local cirques (at lower right) to form a glacier in the Gallatin valley large enough to spill northward and block Fan Creek. The main stem of the glacier moved down the Gallatin valley to the trench following U.S. Highway 191, whereupon one lobe flowed downstream (north) and another moved south into the drainage of Grayling Creek. ... [published overlay not on print or negative]. All the moraines have about the same morphologic expression,...
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Glacial-scour features on the north spur of Sepulcher Mountain. (B) "X" is the site of B. Photomicrograph of striated and polished bedrock outcrop showing degree of preservation of striations and polish. Wyoming, ca. 1968. No index card. Published as Figure 20-B in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Aerial photograph showing areas of Bull Lake moraines in the northern part of the West Yellowstone Basin. Bull Lake ice advanced westward against Horse Butte. The moraines form a well-defined morainal loop in Hebgen Lake. Their hummocky topography is still apparent in spite of a loess mantle. Poorly drained areas are still preserved in the mroainal area near the bottom of the photograph. Dashed line along outer marin of moraines; dotted where inferred. Aerial photography by AMS (Army Map Service), 1954. Wyoming, ca. 1968. No index card. Published as Figure 9 in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Crossed striations on basalt of Observation Peak, atltitude 2,864 m (9,397 ft). Both sets of striations are equally fresh and date from phases of the same glaciation. The younger striations enter into the edge of the area displaying the older striations but do not obliterate them, apparently because of the flow-shadow effect illustrated on the profile section (no scale). Wyoming, ca. 1968. No index card. Published as Figure 15 in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Pinedale terminal moraines along Couger Creek and the Madison River. As shown in figure 10 (locs. 8 and 9), a thin soil with litle or no loess is present on the Pinedale moraines, PM. Arrows, ice flow direction. Note glacial-scour features indicating Pinedale flow to the southwest, oblique to Couger Creek. Outwash channel, OC, is bracketed by single-barb arrows and extends southwestward from Pinedale moraine. BM, large meadow area, Bull Lake ground moraine and kame gravels mantled by loess. Along Madison River Pinedale terminal moraines are locally breached by melt-water channels that extend for at least 3 km west of the...
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Oblique aerial view of flood deposits below the junction of Lamar River with the Yellowstone. Floodwaters more than 50 m deep from the Lamar River left deposits in the wider parts of the Yellowstone valley. A bedrock constriction at the downstream edge of the photograph caused hydraulic damming of the floodwater, resulting in lower velocities and deposition of floodgravels, especially against the valley walls and downstream from spurs. A shallow channel on the flood deposits parallels the near side of the Yellowstone River. Photograph by W.B. Hall, 1970. Wyoming, ca. 1968. No index card. Published as...
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Oblique view, looking northward, of the southeastern part of the Washburn Range, showing its smoothed and rounded appearance. This form is thought to reflect overriding of the entire range by a Pinedale icecap whose axis lay just south of the range (pl. 1A). Bedrock is commonly present within 0.3 m or so of the surface at altitudes above 2,680 m (8,800 ft), and fresh striations indicating glacial flow to the north occur all along the range crest. Dunraven Pass has a glacially rounded, U-shaped form, and striations on the north side of the pass indicate flow northward through the pass. Photograph by W.B. Hall. Wyoming, ca....
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Oblique aerial photograph looking south, showing glacially scoured uplands south of Gallatin Range, indicating ice flow southwest toward the West Yellowstone Basin. Arrows indicating direction of ice flow are nearly at right angles to the strike of the sedimentary bedrock, which is from lower right to upper left. Wyoming, ca. 1968. No index card. Published as Figure 32 in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Convergence of ice streams toward Gardiner to form the northern Yellowstone outlet glacier. 1, Drumloid topography in Gardners Hole (also frontispiece) and adjacent areas formed by northeasterly to northerly flow from the Gallatin Range icecap and the plateau icecap between the Gallatin and Washburn Ranges. 2, Northerly flow between Obsidian and Lava Creeks left striations and basalt erratics on Bunsen Peak. 3, Striations and scour features cross the crest of the northwestern part of the Washburn Range. 4, Glacial-scour features on Mount Everts and adjacent uplands indicates flow swinging from westerly to northwesterly....
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Giant current ripples on midchannel flood bar north of Gardiner, Mont. A. Oblique aerial photograph showing form of bar and pattern of giant current ripples. Flood bar is about 500 m across and 20 m high. Crests of ripples (fig. 45) are about 2 m high and about 15 m apart. Flow was towards the camera. A longitudinal flood bar is shown in the upper right of the photograph. Photograph by J.S. Shelton, 1970. Wyoming, ca. 1968. No index card. Published as Figure 44-A in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Photomicrograph of striated and polished surface of Eocene bedrock on top of Amethyst Mountain (altitude 2,930 m, 9,614 ft), the highest peak on Specimen Ridge. Flow to northwest is indicated by arrow. Note tailing out of striations in direction of flow, and polish on tread (T) and not on riser (R) across stepdown in bedrock surface to the northwest. Similar striations and polish were found on about 10 boulders in the volcaniclastic bedrock. Wyoming, ca. 1968. No index card. Published as Figure 28 in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Directional glacial-scour features. Photomicrograph of small friction cracks. Flow parallel to striations toward the left. Sample collected from summit area of Mount Washburn and coated with thin white film for photographic enhancement. Wyoming, ca. 1968. No index card. Published as Figure 7-C in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: Pond and large erratics in moraines of late Pinedale age near Junction Butte. View is to the southeaset; glacier source mostly out of sight in the left distance. Photographs by W.R. Keefer. Wyoming, ca. 1968. No index card.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Glaciation of Yellowstone National Park was more extensive and involved more interaction of ice from multiple sources than previously recognized. The drumloid topography (arrows) was formed by ice about 600 m thick flowing oblique to the Gallatin Range front; it shows that glacial flow from the valleys in the Gallatin Range was diverted northward by a thick icecap on the plateau east of the range. Thus, the northern Yellowstone glaciation must be considered in terms of coalescing icecaps that covered almost the entire landscape rather than just as valley and piedmont glaciers emanating from the main ranges. Aerial photograph...
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Glacial scour features on Dome Mountain divide, 600 m above the Yellowstone River. The northern Yellowstone outlet glacier filled Yankee Jim Canyon (pl. 1A) and spilled across the high pass in upper right and flowed towards left side of photograph. Note drumloid topography formed on scoured bedrock of Precambrian gneisses and Eocene volcanic rocks. Glacial polish is still apparent on roches moutonnées on the divide. Oblique aerial photograph by W.B. Hall. Wyoming, ca. 1968. No index card. Published as Figure 18 in U.S. Geological Survey. Professional Paper 729-F. 1979.
thumbnail
Album caption: History and Dynamics of Glaciation in the Northern Yellowstone National Park. Directional glacial-scour features. Rat tails on downflow sides of conglomerate pebbles. Flow to the left parallel to striations. Locality on north side of Mount Washburn at altitude of 2,560 m (8,400 ft). Wyoming, ca. 1968. No index card. Published as Figure 7-A in U.S. Geological Survey. Professional Paper 729-F. 1979.


map background search result map search result map Directional glacial-scour features. Rat tails on downflow sides of conglomerate pebbles. Yellowstone National Park, Wyoming. Circa 1968. Directional glacial-scour features. Photomicrograph of small friction cracks. Yellowstone National Park, Wyoming. Circa 1968. Directional glacial-scour features. Photomicrograph of striations rounding a protuberance, summit area of Mount Washburn. Yellowstone National Park, Wyoming. Circa 1968. Aerial photograph showing areas of Bull Lake moraines in the northern part of the West Yellowstone Basin. Yellowstone National Park, Wyoming. Circa 1968. Crossed striations on basalt of Observation Peak. Yellowstone National Park, Wyoming. Circa 1968. Glacial scour features on Dome Mountain divide, 600 m above the Yellowstone River. Yellowstone National Park, Wyoming. Circa 1968. Glacial-scour features on the north spur of Sepulcher Mountain. Yellowstone National Park, Wyoming. Circa 1968. Convergence of ice streams toward Gardiner to form the northern Yellowstone outlet glacier. Yellowstone National Park, Wyoming. 1969. Oblique view, looking northward, of the southeastern part of the Washburn Range, showing its smoothed and rounded appearance. Yellowstone National Park, Wyoming. Circa 1968. Striations and glacial polish on breccia clase in Eocene bedrock at Prospect Peak, northern part of Washburn Range. Yellowstone National Park, Wyoming. Circa 1968. Photomicrograph of striated and polished surface of Eocene bedrock on top of Amethyst Mountain. Yellowstone National Park, Wyoming. Circa 1968. Oblique aerial photograph looking south, showing glacially scoured uplands south of Gallatin Range. Yellowstone National Park, Wyoming. Circa 1968. Pinedale terminal moraines along Couger Creek and the Madison River. Yellowstone National Park, Wyoming. 1954. Aerial photograph showing glacial features on the west side of the Gallatin Range. Yellowstone National Park, Wyoming. 1969. View of extensive glaciation that involved interaction of ice from multiple sources. Yellowstone National Park, Wyoming. 1969. Pond and large erratics in moraines of late Pinedale age near Junction Butte. Yellowstone National Park, Wyoming. Circa 1968. Pond and large erratics in moraines of late Pinedale age near Junction Butte. Yellowstone National Park, Wyoming. Circa 1968. Pond and large erratics in moraines of late Pinedale age near Junction Butte. Yellowstone National Park, Wyoming. Circa 1968. Giant current ripples on midchannel flood bar north of Gardiner, Montana. Yellowstone National Park, Wyoming. 1970. Oblique aerial view of flood deposits below the junction of Lamar River with the Yellowstone. Yellowstone National Park, Wyoming. 1970. Directional glacial-scour features. Rat tails on downflow sides of conglomerate pebbles. Yellowstone National Park, Wyoming. Circa 1968. Directional glacial-scour features. Photomicrograph of small friction cracks. Yellowstone National Park, Wyoming. Circa 1968. Directional glacial-scour features. Photomicrograph of striations rounding a protuberance, summit area of Mount Washburn. Yellowstone National Park, Wyoming. Circa 1968. Aerial photograph showing areas of Bull Lake moraines in the northern part of the West Yellowstone Basin. Yellowstone National Park, Wyoming. Circa 1968. Crossed striations on basalt of Observation Peak. Yellowstone National Park, Wyoming. Circa 1968. Glacial scour features on Dome Mountain divide, 600 m above the Yellowstone River. Yellowstone National Park, Wyoming. Circa 1968. Glacial-scour features on the north spur of Sepulcher Mountain. Yellowstone National Park, Wyoming. Circa 1968. Convergence of ice streams toward Gardiner to form the northern Yellowstone outlet glacier. Yellowstone National Park, Wyoming. 1969. Oblique view, looking northward, of the southeastern part of the Washburn Range, showing its smoothed and rounded appearance. Yellowstone National Park, Wyoming. Circa 1968. Striations and glacial polish on breccia clase in Eocene bedrock at Prospect Peak, northern part of Washburn Range. Yellowstone National Park, Wyoming. Circa 1968. Photomicrograph of striated and polished surface of Eocene bedrock on top of Amethyst Mountain. Yellowstone National Park, Wyoming. Circa 1968. Oblique aerial photograph looking south, showing glacially scoured uplands south of Gallatin Range. Yellowstone National Park, Wyoming. Circa 1968. Pinedale terminal moraines along Couger Creek and the Madison River. Yellowstone National Park, Wyoming. 1954. Aerial photograph showing glacial features on the west side of the Gallatin Range. Yellowstone National Park, Wyoming. 1969. View of extensive glaciation that involved interaction of ice from multiple sources. Yellowstone National Park, Wyoming. 1969. Pond and large erratics in moraines of late Pinedale age near Junction Butte. Yellowstone National Park, Wyoming. Circa 1968. Pond and large erratics in moraines of late Pinedale age near Junction Butte. Yellowstone National Park, Wyoming. Circa 1968. Pond and large erratics in moraines of late Pinedale age near Junction Butte. Yellowstone National Park, Wyoming. Circa 1968. Giant current ripples on midchannel flood bar north of Gardiner, Montana. Yellowstone National Park, Wyoming. 1970. Oblique aerial view of flood deposits below the junction of Lamar River with the Yellowstone. Yellowstone National Park, Wyoming. 1970.