Springs issuing from basalt (Pan)

surface water resources, hydrology

Gravel quarry, CA.

mining, open-pit, groundwater. Resources

Water monitoring of spring (vertical)

groundwater

Groundwater staining along fractures

granite, groundwater, oxidation, alteration, weathering

Cave speleothems, Oregon (square)

travertine

Hot Spring and sinter deposits

groundwater, geothermal

Desert spring along fault, Death Valley

Badwater Spring and fault scarp

paleoseismicity, groundwater

Sinter and hot spring (vertical)

groundwater

Crop circles, Idaho

agriculture, ground water, irrigation, arid, groundwater

Irrigation of potato fields, Idaho

agriculture, groundwater resources

Sinkhole, central Florida

Karst, weathering and erosion