Exogenic Flashcards
processes that cause changes inside and on the surface of the Earth.
Geologic Processes
EXTERNAL
On the surface of the Earth
Exogenic process
INTERNAL
Inside/Beneath the Earth’s Surface
Endogenoc process
WEATHERING
EROSION
MASS WASTING
DEGREDATION PROCESS
WEATHERING TYPES
Mechanical
Chemical
Biotic
AGENTS OF EROSION
Water
Wind
Glacier
MASS WASTING TYPES
Fall
Slide
Flow
TRANSPORTATION PROCESS
Solution
Suspension
Saltation
Traction
AGGRADATION PROCESS
Deposition
Sedimentary Environment
✓ “Breaking down of Rocks”
✓ Disintegration and Decomposition of Rocks
Weathering
rocks are broken up without any change in its chemical composition
Physical Weathering
A. Block Disintegration
B. Expoliation
C. Frost Weathering
Physical weathering
mechanical scraping, just breaking the rocks apart by wind, water / waves, glaciers, gravity, and event plants and animals.
Abrasion
breaking rocks by small fragments
Physical property -
as water expands as it freezes and causes rocks to break apart.
Frost Wedging-
heat changes in temperature caused the rocks to expand and contract and this breaks the rocks apart.
Thermal stress
rock disintegration forms new compounds or new substances caused by chemical reactions
Chemical Weathering
A. Oxidation
B. Carbonation
C. Hydrolysis
Chemical Weathering
water+ Carbonation dioxide = acid (this carbon acid breaks down and weakens rocks caves may be formed by carbonation, dissolving limestone rainwater picks up the co2
Carbonation
changes to new substances chemically
CHEMICAL -
oxygen combines with iron in the rock and creates new compound; iron + oxygen inun oxide commonly known as rust, and this weakens the rocks
Oxidation
hydrogen or hydrate replaces the ion and creates a new substance; eg water plus creel clay
Hydrolysis
This happens when the disintegrations or rocks are caused by living organisms such as humans, animals, and plants.
Biotic Weathering
refers to the downslope movement of rock, regolith, and soil because of gravity.
Mass Wasting
Creep, Slump, Landslides, Mudslides, and Avalanches
Mass movement
Involves the movement of the weathered rock (snow, soil, sand and pebbles) from their site of weathering by the agents of erosion such as wind, moving water, ice and gravity
Erosion
Particles of rock are dissolved in the water and carried along without being seen.
TRACTION
Large boulders and rocks are ‘rolled’ along the bed of the river
SALTATION
Smaller pebbles and stones are ‘bounced’ along the bed of the river.
SUSPENSION
Smaller particles of silt and sand are held within the water and transported along in the flow of water
SOLUTION
process by which sediments are moved along from the substrate due to they are deposited
transportation
