Download UXL encyclopedia of landforms and other geologic features by Rob Nagel PDF
By Rob Nagel
Explores the actual constitution of the Earth's landforms, together with what they're, how they give the impression of being, how they have been created and alter through the years, and significant geological occasions linked to every one.
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Additional info for UXL encyclopedia of landforms and other geologic features
Sample text
There are different types of caves, formed in different areas by different geologic processes, that do not meet the general definition of a cave. U • X • L E N C Y C L O P E D I A O F L A N D F O R M S A N D O T H E R G E O L O G I C F E AT U R E S 31 C AVE FIELD MARK PUBLICATIONS. Glacier caves are formed inside glaciers by meltwater (water from melted ice or snow) that runs through cracks in the ice, producing tunnels and cavities. Sea caves are formed in cliffs and ledges along the shores of oceans and other large bodies of water where the constant pounding of waves wears away rock.
The boundaries where plates meet and interact are known as plate margins. At convergent plate U • X • L E N C Y C L O P E D I A O F L A N D F O R M S A N D O T H E R G E O L O G I C F E AT U R E S 17 C A N YO N The Painted Wall of the Black Canyon The Black Canyon in Colorado has been carved by the erosive action of the Gunnison River over the last two million years. The river runs sharply through the canyon, dropping an average of 95 feet per mile (18 meters per kilometer), one of the greatest rates of fall for a river in North America.
Plates: Large sections of Earth’s lithosphere separated by deep fault zones. Convection current: The circular movement of a gas or liquid between hot and cold areas. Crust: The thin, solid outermost layer of Earth. Erosion: The gradual wearing away of Earth surfaces through the action of wind and water. Fault: A crack or fracture in Earth’s crust along which rock on one side has moved relative to rock on the other. Fault plane: The area where crustal blocks meet and move along a fault from the fault line down into the crust.