DEPOSITION Flashcards
Settlement of sediments out of the transporting medium.
DEPOSITION
The layer formed when the materials are laid down
BED
The distribution of grain size in a layer.
SORTING
The larger sediments in a mixture with various grain sizes
CLASTS
The surrounding fine-grained sediments in a mixture with various grain sizes.
MATRIX
It refers to areas where glaciers and ice sheets are found, such as in high-altitude mountains and polar regions
GLACIAL ENVIRONMENT
Turbulent streams can carry large sediments like boulders and cobbles during floods, forming thick layers of gravel and boulders. Conglomerates usually form in this environment.
MOUNTAIN STREAM
ENVIRONMENT
An alluvial fan is formed when a stream loses energy and decreases velocity at the base of a mountain, primarily composed of sand- to boulder-sized sediments.
MOUNTAIN FRONT ENVIRONMENT
A lake is a tranquil environment where sediment from streams deposits coarse sediments on lake margins, while silt and clay are deposited from suspension in deeper parts.
LAKE ENVIRONMENT
Wind transports sand and silt materials, forming sand dunes and silt loess deposits. Evaporites, formed from temporary desert lakes, are also created
DESERT ENVIRONMENT
Rivers in flat areas carry sediments like pebbles, sand, silt, and mud. Coarse sediments tumble, finer ones move, and sediments form lenses alternating with silt and mud layers.
RIVER ENVIRONMENT
Rivers discharge their load into a delta, extending to shallow coastal areas. The delta is composed of coarse sand, gravel, silt, clay, and mud.
DELTA ENVIRONMENT
Tidal currents transport mud and silt from shorelines and river mouths, depositing them in quieter waters below wave zones, forming well-sorted layers inhabited by worms and mollusks
SHALLOW MARINE ENVIRONMENT
Tidal currents transport sands along the coastline. The waves winnow out the finer sediments, leaving only well-sorted and well-rounded sand grains that form ripples.
BEACH ENVIRONMENT
Coral reefs develop in shallow marine environments with limited sediment supply, forming limestones from carbonate sediments derived from shell and coral fragments.
SHALLOW WATER ENVIRONMENT
