Sedimentary Environment are... correct answers geographic settings where sediments accumulate to form rocks assemblages
Sedimentary Facies correct answers changes in past environments, seen when a single layer of sedimentary rock is traced laterally
High energy environment examples correct an...
EASC 101 - Final Exam || very Flawless.
Sedimentary Environment are... correct answers geographic settings where sediments accumulate
to form rocks assemblages
Sedimentary Facies correct answers changes in past environments, seen when a single layer of
sedimentary rock is traced laterally
High energy environment examples correct answers Waves, currents, deserts, fluvial
environments, alluvial fans, beaches, reefs, glacial environments
The key is movement (fast-flowing water)
High energy environment products correct answers Larger grain sizes, well-sorted to poor-sorted
depending on transportation
Low energy environment products correct answers Small grain sizes, well-sorted, high mud
content
Strata correct answers Horizontal layers of sediment
Metamorphism correct answers Alteration of rock due to changes in physical or chemical
environments
Changes in in mineralogy and texture occur
Low vs High grade correct answers Low grade means minimal changes, high grade means
substantial change
Agents to Metamorphism correct answers Heat (provides energy for chemical reactions),
pressure (increases with depth, can be confining (equal in all directions) or differential (not
equal) pressure)
Foliated correct answers Metamorphic texture that includes planar (nearly flat) arrangements of
mineral grains or structural features in a rock
These minerals rotate or recrystallize with a preferred orientation, and are perpendicular to the
direction of differential pressure
,Non-Foliated correct answers Metamorphic texture for rocks with interlocking crystals
Metamorphic Environments correct answers 1) Contact or thermal metamorphism (rock intruded
my magma/heat)
2) Hydrothermal metamorphism (hot fluids circulating through rock cracks)
3) Burial metamorphism (huge amounts of sediment accumulating in a basin)
4) Subduction zone metamorphism (rock + sediment carried to great depths, ex. oceanic plate)
5) Regional metamorphism (common type of metamorphism, associated with mountain building)
Metamorphism along fault zones may produce a loosely coherent rock called... correct answers
Fault Breccia
Rocks modified or produced by impact is called a... correct answers Impactite
Purpose of Index minerals correct answers Establishing the metamorphic grade of a rock
Erosion correct answers (geology) tTprocess of wearing or grinding something down (as by
particles washing over it)
Drainage Basins correct answers Any area of land where precipitation collects and drains off into
a common outlet, such as into a river, bay, or other body of water.
Zones of River Systems correct answers 1) Sediment production
2) Sediment transport
3) Sediment deposition
Laminar Flow correct answers Water moving in a straight line
Turbulent Flow correct answers Water moves erratically (whirlpools, eddies)
Flow Velocity correct answers Velocity increases in deeper parts of the channel
Factors:
-channel slope/gradient
-channel shape
-channel size and roughness
-discharge (amount of water)
Changes Downstream correct answers Changes in slope on stream profile are usually
accompanied by an increase in discharge and channel size, and a reduction in particle size
Quarrying correct answers Removal of blocks from channel bed
Abrasion correct answers Bed and banks of a bedrock channel are bombarded by particles
carried within the flow
Corrosion correct answers Gradual dissolution of rock by flowing water
Methods of sediment transportation in streams correct answers -Solutions (dissolved)
-Suspensions (suspended)
-Skipping/rolling/sliding along
Capacity correct answers Max load of solid particles a stream can transport per unit of time
Competence correct answers Stream's transportation capabilities based on size and not quantity
Stream Channel correct answers An open conduit that consists of the bed and banks that confine
flow, except during flooding
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