Permian Basin of West Texas

Permian Basin of West Texas - evaporates Collectively, they...

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Guadalupe and Carlsbad National Parks
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Features associated with subsurface water
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Geologic work of groundwater Groundwater dissolves rock Groundwater is often mildly acidic Contains weak carbonic acid Forms when rainwater dissolves carbon dioxide from the air and from decaying plants Carbonic acid reacts with calcite in limestone to form calcium bicarbonate, a soluble material
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Geologic work of groundwater Caverns Most caverns are created by acidic groundwater dissolving soluble rock at or just below the surface in the zone of saturation Features found within caverns They form in the zone of aeration
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Geologic work of groundwater Caverns Features found within caverns Composed of dripstone ( travertine ) » Calcite deposited as dripping water
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Unformatted text preview: evaporates Collectively, they are called speleothems Includes stalactites (hanging from the ceiling) and stalagmites (form on the floor of a cavern) Geologic work of groundwater Karst topography Landscapes that to a large extent have been shaped by the dissolving power of groundwater Some common features include Irregular terrain Sinkhole or sinks (formed by groundwater slowly dissolving the bedrock often accompanied by collapse) Striking lack of surface drainage (streams) Development of karst topography Development of karst topography Speleothems in Carlsbad Caverns National Park Soda straws in Carlsbad Caverns National Park...
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This note was uploaded on 07/17/2008 for the course GS 105 taught by Professor Leavell during the Winter '08 term at Ohio State.

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Permian Basin of West Texas - evaporates Collectively, they...

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