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Sed rocks test 2
N/a
24
Geology
Undergraduate 2
02/16/2013

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Cards

Term
What are the basic types of rivers?
Definition
Meadndering, distributary, braid. Meandering looks a bit like a sine wave. Distributary looks like a tree branch. Braided with rivers and island in between literally looks like girl's braided hair.
Term
How does lateral accretion take place in each kind of river?
Definition
Term
Why is the vertical texture trend in point pars fine upward?
Definition
Term
Why do braided streams have no levees?
Definition
they're mostly associated with meandering
Term
How does sand and mud affect geometry and disposition? Also, beload vs suspended load.
Definition
Term
Point bars
Definition
depoistional feature made of sand and gravel that accumaltes on the inside bend of streams and rivers below the slip off slope. crescent shape. well sorted sediment, gentle slope found mainly in meandering streams
Term
Levees
Definition
elongated naturally occuring ridge that is paralell to the course of a river. it forms when meandering rivers carrying lots of suspended sediment (sand silt mud) flood and sediment which is in water that is over the banks of the river settle out.
Term
Flood basin
Definition
Term
Crevasse splays
Definition
forms when a stream breaks its levees and deposits sediment on a flood plain. looks like an alluvial fan. creates graded deposits. in some cases river abandons its old channel
Term
Transverse bars
Definition
Term
Longitudinal bars
Definition
Term
Basic types of deltas
Definition
Fluvial (elongate and lobate), wave dominated, tide dominated.
Term
Importance of channel mouth bar
Definition
Term
Formation of distributaries
Definition
Term
Importance of sediment caliber
Definition
Term
sand rich vs mud rich deltas
Definition
Wave dominated= 50% mud 50% sand
Term
process of progradation. how does it work, result?
Definition
Term
prodelta
Definition
Part of a delta lying beyond the delta front, and sloping gently down to the basin floor. entirely below water level.
Term
delta front
Definition
Term
coastal beach ridges
Definition
Term
elongate tidal bar
Definition
Term
flood basin
Definition
Term
delta plain
Definition
plain formed by deposition of silt at the mouth of a stream or by overflow along
Term
Type of river systems associated with deltas
Definition
For lobate delta: ditributary.
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