Weathering and Erosion

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Weathering and Erosion. Weathering – processes by which environmental agents at or near the earth’s surface. cause rocks and minerals to break down. Sediment-. Small pieces of rock. Mud, sand, or silt are very fine pieces of rock. Weathering Processes. Mechanical weathering –. - PowerPoint PPT Presentation

Text of Weathering and Erosion

Erosion Deer Creek Falls

Weathering and ErosionWeathering processes by which environmental agents at or near the earths surface

cause rocks and minerals to break down

Small pieces of rock. Mud, sand, or silt are very fine pieces of rock.Sediment-Weathering Processes

Chemical weathering changes the chemical composition of minerals and rocks Mechanical weathering breaks a mineral or rock into smaller pieces (physical changes)

Mechanicalweathering- Wind weathering in Monument Valley, ArizonaChemical Weathering- Rusting can completely eat away iron.

Erosion process by which gravity, moving water, wind, or ice transports pieces of rock and deposits them elsewhere

Devils Tower- volcanic plugWater Erosion

Deer Creek Falls

Thunder River in the Grand Canyon

Water erosion in a field

Wavecut pattern, a geological feature caused by the sea's erosion of cliffs, seen at Southerndown near Bridgend, South Wales.

Loess is a deposit of silt or material which is usually yellowish or brown in color and consisting of clay or dust brought by windIn the Swiss Alps-The Upper Grindelwald Glacier and the Schreckhorn

Glaciation- changing of landforms by slowly moving glaciersGlacial Erosion

A glaciated valley in the Mount Hood Wilderness showing the characteristic U-shape and flat bottom. Moraine is rock debris, fallen or plucked from a mountain and transported by glaciers or ice sheets. The moraine may be lying on the glacier's surface or have been deposited as piles or sheets of debris, where the glacier has melted

Soil FactorsParent material chemical composition of the original rock from which soil develops Relief-physical features of a landscape Organisms- plants, worms, ants that decompose material Climate amount of precipitation and prevailing temperature Time longer period develops thicker more well-developed soil(2.5 cc per 100 years)Building SoilWeathering and erosion are a part of the process of building soilSoil is a loose mix of:Weathered rockOrganic matterAir Water

Soil Fertility

Soil Fertility depends on the texture of the soil and the amount of: humus- the amount of organic materialair and water

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