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GEO 111
Geology 111 USA
22
Geology
Undergraduate 2
03/07/2012

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Cards

Term
Natural levee
Definition
Sandy deposits that build up along channel edge
Term
Mature sandstones
Definition
Fine sedimentary rock (less than 15% of rock)
Term
Immature sandstones
Definition
Immature sedimentary rock (over 15% of rock)
Term
Submarine Canyon
Definition
Steep-sided erosional valleys on continental slopes, generally extensions to large river valleys
Term
Hyperpycnal currents
Definition
Dense sediment laden currents triggered by massive floods which flow down the continental margin.
Term
Turbidity currents
Definition
Suspension of water sand and mud that moves down slope often very rapidly due to its greater density that the surrounding water, often triggered by earthquakes
Term
Vertical stream erosion
Definition
Down cutting stream erosion
Term
Base level of stream
Definition
Elevation at which a stream ends by entering a large standing body of water such as a lake or the ocean
Term
River Delta
Definition
Occurs where tidal range is very low and tidal current action is very weak.
Term
Tide delta
Definition
Occurs in regions where wave action is limited and tidal ranges are high
Term
Wave delta
Definition
Occurs where wave energy is high, wave action reworks deposited sediments to form bars and beaches, creating straight shoreline with only small protuberance
Term
Continental Slope
Definition
A steeper, typically mud-draped slope marking the edge of the continental slope.
Term
Continental shelf
Definition
Broad flatly sloping platform extending from the shoreline to the beginning of the continental slope
Term
Abyssal hills
Definition
linear ridges of basalt covered with a thin veneer of deep sea sediment on the flanks of the mid-ocean ridge.
Term
Flood plain
Definition
flat area near a river or stream that is prone to flooding.
Term
Continental shelf
Definition
Where the continent dips off and forms the ocean
Term
Abyssal plain
Definition
sea floor
Term
Marine terrace
Definition
Cliffs formed at previous high stands of sea level
Term
River terrace
Definition
Combined uplift and erosion in an established floodplain can result in formation of these as stream channel down cutting occurs.
Term
Drainage divide
Definition
edge of two adjacent drainage basins
Term
Drainage basin
Definition
funnel all water that falls in the area to a single water body via an interconnected work of tributaries
Term
Antecedent stream
Definition
May result as a stream erodes downward through an actively uplifting area.
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