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Tributary and trunk glaciers, Greenland
Aerial view of tributary and trunk glaciers, Greenland. When the ice melts back it will leave behind a deep valley and hanging valley on the side. (Gl-03)
Download ImageSpring issuing from base of glacial till, Canadian Rockies
Spring issuing from base of glacial till, southern Alberta, Canada. (G-26)
Download ImageFracture-controlled liesegang banding
Fracture-controlled liesegang banding in siltstone. (Image ID # G-25)
Download ImageGroundwater staining along fractures
Groundwater staining along fractures in granitic rock, Sierra Nevada, California
Download ImageColumns and stalactites in cave.
Columns and stalactites, Lehman Caves, Nevada. Note the stalactites form preferentially along fractures in the ceiling of the cave.
Download ImageGrand Prismatic Spring (vertical)
Grand Prismatic Spring, a giant hot spring in Yellowstone National Park, Wyoming. Colors come from thermophilic bacteria.(G-18)
Download ImageSubsidence from groundwater withdrawal
Subsidence from groundwater withdrawal, North Las Vegas, Nevada. (G-22)
Download ImageGroundwater staining along fractures (vertical)
Groundwater staining along fractures in granodiorite, Sierra Nevada, California. (G-14)
Download ImageCave speleothems, Oregon (vertical)
Cave Formations, or speleothems, form by precipitation of calcite from groundwater. Stalagmite, stalactites, and columns, Oregon Caves National Monument, Oregon. (G-17)
Download ImageCave speleothems, Oregon (square)
Cave Formations, or speleothems, form by precipitation of calcite from groundwater. Stalagmite, stalactites, and columns, Oregon Caves National Monument, Oregon. (G-17c)
Download ImageGroundwater seepage near bottom of alluvial fan
Zone of groundwater seepage near bottom of alluvial fan as expressed by salt deposit, Death Valley National Park, California. (G-08)
Download ImageSteam emanating geyser before eruption
Steam emanating from Echinus Geyser prior to eruption, Yellowstone National Park, Wyoming. (G-12)
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Stalagmites in cave, (vertical)
Stalagmites, Lewis and Clark Caverns, Montana. (G-13)
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Springs arranged radially around alluvial fan where groundwater emerges. Furnace Creek, Death Valley, National Park, California. (G-06).
Download ImageHot Springs, Fumaroles, sinter, Yellowstone NP
Hot springs, fumaroles, and hydrothermal deposits, Norris Geyser Basin, Yellowstone National Park, Wyoming. Most of the deposits are sinter. (G-10)
Download ImageTravertine deposits at hot springs, Wyoming
Travertine deposits at Minerva Terrace, Mammoth hot springs, Yellowstone National Park, Wyoming. (G-11)
Download ImageGroundwater seeping from bedding contacts
Groundwater seep from bedding contacts, West Texas. (G-03)
Download ImageHot Spring and sinter deposits
Hot Spring and sinter deposits, Yellowstone National Park, Wyoming. (G-09)
Download ImageSprings midway down alluvial fan, Furnace Creek, Death Valley, CA, and radial spring
Springs midway down alluvial fan, Furnace Creek, Death Valley National Park, California.
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