Springs (hydrology)

terrestrial water source

thumb|upright=1.3|alt=Water ejecting from the ground and steam rising to the right|Old Faithful erupting at [[Yellowstone National Park]]

spring produced by the emergence of geothermally heated groundwater

thumb|Reflection (physics)|Reflections in a forest puddle

thumb|upright=1.6|Travertine terraces at Mammoth Hot Springs, [[Yellowstone National Park, in 2016]]

spring that is part of a karst system

natural springs that produce water containing minerals

thumb|upright=1.35|A seep puddle in a [[forest clearing]] A seep or flush is a moist or wet place where water, usually groundwater, reaches the Earth's surface from an underground aquifer.

thumb|Mudpot in Lassen Volcanic National Park thumb|Mudpots lined up above a volcanic fissure at Krafla|Hverarönd, [[Iceland]]

type of source

small building constructed over a spring

natural explosive eruption of cold water