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Geology Chapter 5
Terms in this set (29)
Continental shileds are part of the
A transitional depositional environment would be
An eolian depositional envirnoment is represented by a
Wind-blown wind deposit
An example of an estuary is
Black fine-grained sediments are typically deposited in
The deep marine
The red iron mineral in red beds is
When clastic particles are rapidly deposited this usually results in
A sedimentary characteristic that occurs during turbidity current deposition is
Grains tumbling down the downwind side of a sand dune form the sedimentary structure known as
Ripple marks that show this form indicate water flow direction
The name of sandstone whose composition is about one-fourth or more feldspars is
Graywacke sandstone is most likely found in which marine depositional environment?
Off shore from rapidly rising mountains
The most likely spot for ooids to de deposited is a
The Grand Canyon Supergroup sits on the Vishnu Schist and a granite. This contact is an unconformity of what type?
The Hermit Shale sits on the Supai Group. This contact is an unconformity of what type?
The Tapeats Sandstone sits on the Grand Canyon Supergroup. This unconformity is an unconformity of what type?
What are the oldest rocks shown in the column of the Grand Canyon?
The Vishnu Basement Rocks at the bottom because they are the farthest layer of rocks down.
Requirements to be considered a sedimentary archive:
1. Tectonic Setting
2. Biological processes in the environment
3. Method of sediment transport
4. Rocks in source area
Stable: Midwest U.S.
Sinking: New Orleans, Mexico
Rising gently: New England, Canada
Rising actively: Cascade Mtns in Oregon
Tectonic Elements of a Continent
2. Orogenic belt
Extrabasinal: weathering outside
Intrabasinal: chemicals inside
Marine Environments: oceans
-mouth of river
-sand, silt, clay
-sea levels rise from melted glaciers
-due to tectonic subsidence
-sand or gravel
-sediment is coarse
-large or small
-shallow or deep
-sediment is eroded
-glacial deposits called till
Deposition of Clay
-indicate low energy
-sheltered from waves
-commonly formed in lagoons
-shale splits into thin layers
-clay stone is smooth
-bed is smallest
-formations are bigger and thicker
-facies grade laterally
-sea level rise is transgression
-transgressions are caused by melting of polar caps and displacement of ocean water
-regression is when the sea level drops
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