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Geology > erosion > Flashcards

erosion Flashcards

1
Q

weathering

A

breakdown of rock at or near the Earth’s surface

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2
Q

Mass wasting

A

transfer of rock and soil downslope by GRAVITY

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3
Q

Erosion

A

the physical removal material by WATER, WIND or ICE

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4
Q

Mech Weathering

A

breaking of rocks into smaller pieces

DOES NOT CHANGE chem position

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5
Q

Chem Weathering

A

chemical transformation of rocks into 1+ compounds

breaks down rock components

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6
Q

Frost Wedging

A

water in cracks freezes, expands breaking rocks

TALUS SLOPES

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7
Q

TALUS SLOPES

A

piles of rocks caused from frost wedging

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8
Q

Mech weathering and surface Area (increased or decrease)

A

INCREASE- exposing more surface area to chemical weathering

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9
Q

Sheeting- what does it create

A

concrete slabs breaking loose

EXFOLIATION DOMES

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10
Q

EXFOLIATION DOMES and cause

A

unloading and expansions of rocks (building on each other)

temperature cycling and stress relief

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11
Q

Biological Activity

A

disintegration resulting from plants (roots), burrowing animals, and humans•
Lichens and mosses enhance breakdown of rock surfaces

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12
Q

most important agent in Chem weathering

A

WATER (dissolutions, oxidation, hydrolysis)

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13
Q

Dissolution

A

ions released by ACIDITY

ex. sinkholes

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14
Q

Oxidation

A

elements loses electrons

ex. Iron in Mafic materials

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15
Q

Hydrolysis

A

causes crystal structure to collapse

ex. feldspar to clay

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16
Q

most chemically stable

A

silica dioxide- QUARTZ

granite-very resilient

17
Q

RATES OF WEATHERING

A

increase temp and moisture accelerates weathering

18
Q 
Parent Material
Time
climate
Drainage
Plants and animals
A 
Rock Type
rates of weathering and erosion
rates and chemistry
filteration
chem and mech impact
19
Q

Topography

A

FASTER EROSION ON STEEPER GROUND

Geology (14 decks)

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