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Album caption and index card: Seismic Geyser, during an explosive thermal eruption. Note the trees that have been killed by the heat and eruptive activity. According to George D. Marler of the U.S. National Park Service, this geyser developed from a crack caused by the Hebgen Lake Earthquake of August 17, 1959. Yellowstone National Park, Wyoming. 1970.
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Album caption and index card: A large magma chamber formed deep within the earth, and the molten rock began to force its way slowly toward the surface. As it pushed upward, it arched the overlying rocks into a broad dome. The arching produced a series of concentric fractures, or a ring fracture zone, around the crest of the dome. The fractures extended downward toward the top of the magma chamber. Yellowstone National Park, Wyoming. 1970. Published as Figure 23-A in U.S. Geological Survey. Bulletin 1347. 1971.
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Album caption and index card: Land slump in Woodside formation just east of earth flow, and just south of divide between Kirkwood and Cabin Creek drainages. Montana earthquake area. Gallatin County, Montana. August 1959. (Aerial view).
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Album caption and index card: Upper Falls on the Yellowstone River. The brink of the falls marks the contact between dense, resistant rhyolite lava (which forms the massive cliff) and more easily eroded rhyolite lava containing a high proportion of volcanic glass immediately downstream. Yellowstone National Park, Wyoming. 1970. Published as Figure 40-B in U.S. Geological Survey. Bulletin 1347. 1971.
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Album caption and index card: Gibbon Falls on Gibbon River. The river tumbles over a scarp etched in the Yellowstone Tuff. The scarp first formed along faults at the north edge of the Yellwostone caldera 600,000 years ago, at a point that now lies 1/4 to 1/2 mile downstream. Continued erosion has caused the falls to recede northward to their present position. Yellowstone National Park, Wyoming. 1970. Published as Figure 40-C in U.S. Geological Survey. Bulletin 1347. 1971.
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Album caption: Yellowstone Lake. View southeast across Yellowstone Lake toward the western foothills and crest of the Absaroka Range. The Absaroka Range is an erosional remnant of a vast pile opf volcanic lavas and breccias (Absaroka volcanic rocks) that once covered all of Yellowstone caldera. Yellowstone National Park, Wyoming. 1970. No index card. Published as Figure 27 in U.S. Geological Survey. Bulletin 1347. 1971.
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Album caption and index card: Two ledges of basalt spectacularly exposed in the east wall of the Grand Canyon of the Yellowstone at The Narrows near Tower Falls. The light-colored rocks between the basalt flows are ancient stream gravels deposited about 1.5 million years ago, when the channel of the Yellowstone River was farther east and not as deep as it is today. The hill is capped by lake sediments, sand, and gravel deposited when the Yellowstone River was blocked by a glacial dam farther downstream (to the left). The brown rocks at the base of the cliff are Absaroka andesite breccias. Yellowstone National Park, Wyoming. 1970. Published as a portion of Figure 33 (upper photo) in U.S. Geological Survey. Bulletin...
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Album caption and index card: Hayden Valley. View north along the Yellowstone River and Hayden Valley toward the Washburn Range. Mount Washburn, part of an ancient Absaroka volcano, is the highest prominence (elevation 10,293 feet) on the skyline to the right, and Dunraven Pass is in the notch in the center of the skyline. Hayden Valley is cut in glacial lake sediments that overlie thick lava flows covering the caldera floor. Yellowstone National Park, Wyoming. 1970.
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Album caption and index card: Crowfoot Ridge in the southern Gallatin Range, as viewed from the road along the Gallatin River near the northwest corner of Yellowstone National Park. The rocks, chiefly Paleozoic limestone, sandstone, and shale, were deposited in broad shallow seas that covered all of the Yellowstone region several hundred million years ago. The original layers were horizontal, but they have since been tilted and broken by giant mountain-building forces originating deep within the earth. Yellowstone National Park, Wyoming. 1970. Published as Figure 9 in U.S. Geological Survey. Bulletin 1347. 1971.
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Album caption and index card: Common kinds of thermal features in Yellowstone National Park. Hot springs and terraces colored by algae at Mammoth Hot Springs. Yellowstone National Park, Wyoming. 1970. Published as Figure 43-A in U.S. Geological Survey. Bulletin 1347. 1971.
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Album caption and index card: Closeup view of intrusive igneous rock (diorite) from Electric Peak stock in the Gallatin Range is pictures in photo no. 745 (sjr00745). The rock is composed chiefly of light-colored quartz and feldspar and dark-colored iron and magnesium silicate minerals. Yellowstone National Park, Wyoming. 1970. (Specimen). Published as Figure 20 in U.S. Geological Survey. Bulletin 1347. 1971.
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Album caption and index card: Massive beds of breccia of the Absaroka volcanic rocks along the road north of Dunraven Pass. This breccia formed part of a steep-sided volcanic cone, of which Mount Washburn is a remnant. Closeup view shows very coarse character of the breccia, with large rock fragments imbedded in fine ash, dust and sand. Nearly all the rocks are of andesitic composition, consisting chiefly of feldspar and pyroxene. The most common colors are medium to fairly dark shades of brown, red, purple, and gray. Yellowstone National Park, Wyoming. 1970. Published as Figure 17 (lower photo) in U.S. Geological Survey. Bulletin 1347. 1971.
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Album caption and index card: The ring fractures eventually tapped the magma chamber, the uppermost part of which contained a high proportion of dissolved gases. With the sudden release of pressure, tremendous amounts of hot gases and molten rock were erupted almost instantly. The liquid solidified into pumice, ash, and dust and it was blown out. Some of the dust and ash was blown high into the air and carried along by the wind, but much of the debris moved outward across the landscape as vast ash flows, rapidly covering thousands of square miles. Yellowstone National Park, Wyoming. 1970. Published as Figure 23-B in U.S. Geological Survey. Bulletin 1347. 1971.
map background search result map search result map Intrusive igneous rock (diorite) from Electric Peak stock in the Gallatin Range. Yellowstone National Park, Wyoming. 1970. Seismic Geyser in Upper Geyser Basin during an explosive thermal eruption. Yellowstone National Park, Wyoming. 1970. Massive beds of breccia of the Absaroka volcanic rocks along the road north of Dunraven Pass. Yellowstone National Park, Wyoming. 1970. Caldera development - first of four schematic diagrams showing idealized stages in the development of the Yellowstone caldera 600,000 years ago. Yellowstone National Park, Wyoming. 1970. Caldera development - first of four schematic diagrams showing idealized stages in the development of the Yellowstone caldera 600,000 years ago. Yellowstone National Park, Wyoming. 1970. Crowfoot Ridge in the southern Gallatin Range, as viewed from the road along the Gallatin River near the northwest corner of the park. Yellowstone National Park, Wyoming. 1970. Terraces of travertine at Opal Springs, Mammoth Hot Springs area. Yellowstone National Park, Wyoming. 1970. Old Faithful Geyser in Upper Geyser Basin in eruption. Yellowstone National Park, Wyoming. 1970. Old Faithful Geyser in Upper Geyser Basin in eruption. Yellowstone National Park, Wyoming. 1970. Old Faithful Geyser in Upper Geyser Basin in eruption. Yellowstone National Park, Wyoming. 1970. Hot springs and terraces colored by algae at Mammoth Hot Springs. Yellowstone National Park, Wyoming. 1970. Old Faithful Geyser in eruption. Yellowstone National Park, Wyoming. 1970. Two ledges of basalt spectacularly exposed in the east wall of the Grand Canyon of the Yellowstone at The Narrows near Tower Falls. Yellowstone National Park, Wyoming. 1970. View southeast across Yellowstone Lake toward the western foothills and crest of the Absaroka Range. Yellowstone National Park, Wyoming. 1970. View north along the Yellowstone River and Hayden Valley toward the Washburn Range. Yellowstone National Park, Wyoming. 1970. Gibbon Falls on Gibbon River. Yellowstone National Park, Wyoming. 1970. Upper Falls on the Yellowstone River. Yellowstone National Park, Wyoming. 1970. Red Canyon fault scarp. Hebgen Lake, Gallatin County, Montana Earthquake. 1959. Debris ridge on Madison slide, and J.B. Hadley. Hebgen Lake, Gallatin County, Montana Earthquake. 1959. Land slump in Woodside formation just east of earth flow. Gallatin County, Montana. 1959. Red Canyon fault scarp. Hebgen Lake, Gallatin County, Montana Earthquake. 1959. Debris ridge on Madison slide, and J.B. Hadley. Hebgen Lake, Gallatin County, Montana Earthquake. 1959. Land slump in Woodside formation just east of earth flow. Gallatin County, Montana. 1959. Intrusive igneous rock (diorite) from Electric Peak stock in the Gallatin Range. Yellowstone National Park, Wyoming. 1970. Seismic Geyser in Upper Geyser Basin during an explosive thermal eruption. Yellowstone National Park, Wyoming. 1970. Massive beds of breccia of the Absaroka volcanic rocks along the road north of Dunraven Pass. Yellowstone National Park, Wyoming. 1970. Caldera development - first of four schematic diagrams showing idealized stages in the development of the Yellowstone caldera 600,000 years ago. Yellowstone National Park, Wyoming. 1970. Caldera development - first of four schematic diagrams showing idealized stages in the development of the Yellowstone caldera 600,000 years ago. Yellowstone National Park, Wyoming. 1970. Crowfoot Ridge in the southern Gallatin Range, as viewed from the road along the Gallatin River near the northwest corner of the park. Yellowstone National Park, Wyoming. 1970. Terraces of travertine at Opal Springs, Mammoth Hot Springs area. Yellowstone National Park, Wyoming. 1970. Old Faithful Geyser in Upper Geyser Basin in eruption. Yellowstone National Park, Wyoming. 1970. Old Faithful Geyser in Upper Geyser Basin in eruption. Yellowstone National Park, Wyoming. 1970. Old Faithful Geyser in Upper Geyser Basin in eruption. Yellowstone National Park, Wyoming. 1970. Hot springs and terraces colored by algae at Mammoth Hot Springs. Yellowstone National Park, Wyoming. 1970. Old Faithful Geyser in eruption. Yellowstone National Park, Wyoming. 1970. Two ledges of basalt spectacularly exposed in the east wall of the Grand Canyon of the Yellowstone at The Narrows near Tower Falls. Yellowstone National Park, Wyoming. 1970. View southeast across Yellowstone Lake toward the western foothills and crest of the Absaroka Range. Yellowstone National Park, Wyoming. 1970. View north along the Yellowstone River and Hayden Valley toward the Washburn Range. Yellowstone National Park, Wyoming. 1970. Gibbon Falls on Gibbon River. Yellowstone National Park, Wyoming. 1970. Upper Falls on the Yellowstone River. Yellowstone National Park, Wyoming. 1970.