Groundwater
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Steam and hydrothermal alteration, Iceland
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2018/09/180910-40.jpg?w=1500&ssl=1)
Steam and hydrothermal alteration in the western rift zone, Iceland (180910-40)
Download ImageKarstic spring, Crete, Greece (vertical)
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2018/04/180328-60.jpg?w=1500&ssl=1)
Spring issuing from karst-weathered limestone, Crete, Greece (180328-60)
Download ImageExposed water table in quarry, Spokane, WA
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/11/150705-38.jpg?w=1500&ssl=1)
Exposed water table (Spokane Aquifer) in quarry, Spokane, Washington (150705-38)
Download ImageSprings issuing from basalt (Pan)
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/10/171016-16f.jpg?w=1500&ssl=1)
Spring water issuing from basaltic lava flows at Tamolitch Pool on the McKenzie River, Oregon. (171016-16f)
Download ImageGravel quarry, CA.
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/Res-29.jpg?w=1500&ssl=1)
Aerial view of gravel quarry, California. Note that it intersects the ground water table. (res-29)
Download ImageWater monitoring of spring (vertical)
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/IMG_5237.jpg?w=1500&ssl=1)
Water monitoring of spring at Devils Hole, Mojave Desert, California. (IMG_5237)
Download ImageSpring issuing from base of glacial till, Canadian Rockies
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/G-26.jpg?w=1500&ssl=1)
Spring issuing from base of glacial till, southern Alberta, Canada. (G-26)
Download ImageGroundwater staining along fractures
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/G-23.jpg?w=1500&ssl=1)
Groundwater staining along fractures in granitic rock, Sierra Nevada, California
Download ImageCave speleothems, Oregon (square)
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/G-17c.jpg?w=1500&ssl=1)
Cave Formations, or speleothems, form by precipitation of calcite from groundwater. Stalagmite, stalactites, and columns, Oregon Caves National Monument, Oregon. (G-17c)
Download ImageHot Spring and sinter deposits
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/G-09.jpg?w=1500&ssl=1)
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
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/G-07.jpg?w=1500&ssl=1)
Springs midway down alluvial fan, Furnace Creek, Death Valley National Park, California.
Download ImageDesert spring along fault, Death Valley
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/G-04.jpg?w=1500&ssl=1)
Badwater Spring issues from a recently active fault along the front of the Black Mountains, visible as two fault scarps in the background on the alluvial fan (G-04)
Download ImageSinter and hot spring (vertical)
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/5D-6435.jpg?w=1500&ssl=1)
Sinter (silica) deposits and hot spring, Yellowstone National Park, Wyoming. Photo is about 1.5 meters across. (5D-6435)
Download ImageSinkhole, central Florida
![](https://i0.wp.com/geologypics.com/wp-content/uploads/2017/04/140308-60.jpg?w=1500&ssl=1)
Aerial view of circular sinkhole in central Florida. Sinkholes form by dissolution and collapse of underlying limestone bedrock. The water level marks the groundwater table. (140308-60)
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