Despositional Sedimentary Environeme Flashcards
part of the earth’s surface
which is physically, chemically, and biologically
distinct from adjacent areas
Depositional environment
Types of depositional environment
Terrestrial, marine and transitional
Process of deposition through rivers and
streams (confined bodies of water moving
downhill in channels).
Fluvial
Types of fluvial
Straight/braided and meandering
Type of fluvial which is consist of small channels
Straigh/Braided
Type of fluvial that is sinuous wiver with bends, snaking pattern as streams back n forth
Meandering river
Place of erosion in meandering river
Cutbanks / outer banks
Place of deposition in meandering river
Point bar/ innerpart
Fan or coned shaped deposits of sediments built up by streams
Alluvial fan
Where the finer sand settles along the inner bends of the river
Pointbars
Dominated by wind currents rather than water
Aeolian environment
Formed by the accumulation of wind blown silts and lesser and variable ammount of sand and clay that are loosely cemented by carbonate materials
Loess
Prograding deposition bodies that form at the point where a RIVER debauches in a LAKE or SEA
Deltas
Dessert alluvial fan
Bajada
Sediments deposited within the lakes
Lacustrine
Land locked body of standing, non marine water
Lake
Paludal environment
Swamps
Lakes formed from crustal stretching
Rift garden
Form lacustrine deposit from seasonal overflood banking
Oxbow lake
Type of sedimentary environment that is controlled mostly by the weathering and erosion by glaciers and glacial meltwater
Glacial
Occurs by addition of snowfall, compaction and recrystallization
Accumulation
Loss of mass from melting
Ablation
Cracks in glacier
Crevasses
Glacier deposition making land features
Moraines
half-bowled-shaped valley formed by glacial erosion
Cirques
sharp long narrow ridges at mountain tops formed by glacial
erosion.
Arete
areas that are close to shore, but always submerged
Shallow marine
areas have a significant amount of mature clastic sediment along with marine algae (like sea grass) as well as skeletal material from animals like coral, echinoderms (sea urchins and sand dollars), and mollusks (clams and snai
Shallow marine
areas have a significant amount of mature clastic sediment along with marine algae (like sea grass) as well as skeletal material from animals like coral, echinoderms (sea urchins and sand dollars), and mollusks (clams and snai
Shallow marine
formed through the growth of coral colonies building a large three-dimensional structure built from calcite skeletons
Reef
Found in warm tropical shallow water
Reef depositional environment
These areas are beyond the reach of most clastic sediment other than the dust carried by the wind.
Deep marine
beach depositional environments there are areas where rivers flow into the ocean
Deltas
Shorelines that are influenced by strong daily tidal current
Tidal mudflat depositional environment
Tides are currents that are the result of the gravitational forces exerted by the _________
Moon and rotation of the earth
Shorelines that are dominated by ocean currents
Beach depositional environment
