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Copy of Weathering and Erosion

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April Licea

on 30 November 2018

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Transcript of Copy of Weathering and Erosion

Weathering, Erosion, and Deposition from Ice, Water, and Wind
Slow Changes to the Earth's Surface
thering is the breaking down and
ing away of rock.
Weathering ?
When you try to affect something like weathering with acid, surface area, and heat it will make big changes. The more acid the faster the weathering. The tinier surface area the faster the reaction. Then also the higher the temperature the faster the process.
The Affects
Erosion is the
of the weathered materials by ice, water, or wind.
You can slow down erosion by trying to anchor the soil in place and to slow down the water moving across it. You can do the opposite to make it speed up.
The last step of weathering where the particles are moved to
Sand Dunes
Grand Canyon
This land form was formed by Erosion and layers of rock forming.
Whenever the sand gets eroded from the beach and blows into the sea grass growing on the beach and starts piling up and then eventually grows to be at least 5-6 feet tall
Sand Dunes
Whenever the erosion of the rivers all the sediments flow into the delta making it all dirty from the sediments that flowed into it.
Sand Dunes
The processes of erosion and deposition form all sand dunes
Rock Arches
When rock arches are formed they are formed by various types of erosion.
Caves / Caverns
Caves and caverns normally form by erosion and gravitational breakdown
Deltas are formed by Erosion and Deposition
With the rock cycle weathering and erosion is a big part. It breaks rocks down and then it eventually gets down in the Earth after a long time then can eventually get tightly packed together and form new rocks.
Rock Cycle
Rock Cycle pt.2
All the broken down pices from erosion get moved then they can all at some point get condensed and may become a part of the sedimentary rocks.
Weathering, Erosion, and Deposition by IceU-Valley Formation by a Glacier
1. The land has rivers flowing along it. The rivers have weathered and eroded the land to form a V-shaped valley.
2. The snow begins to collect and pack into the valley.
3. The snow and ice thicken. The slope of the valley, the pressure of the snow and ice, and gravity cause the mass of snow and ice to move. The movement weathers and erodes the land beneath the glacier. Sediments become trapped under the moving mass and scrapes away at the valley.

4. Debris, in the form of rocks and boulders, moves along the valley. As the glacier retreats or melts, a U-shaped valley is left.
Glaciers: U-Shaped Valleys
The Glaciers move down a mountain (gravity); it moves little pieces of sediments along with it.
Mt. Hood Wilderness: The U-shaped valley was formed by a glacier.
Glaciers: Fjords [fyawrd ]
This picture shows Milford Sound, a fjord in the southwest of the South Island in New Zealand.
Picture: Wikicommons

ion is the dropping off or depositing of the materials that were eroded by ice, water, and wind.
Weathering, Erosion, and Deposition by Ice: Formation of Fjords
Fjords are created when glaciers retreat.

The glaciers weather and erode the land, forming the U-shaped valley.

The material is deposited in various locations in the valley.

When the glacier retreats and sea levels rise, the water flows into (and fills) the valley floor.
Weathering, Erosion, and Deposition by Water: Canyons
Grand Canyon in 1872
Weathering, Erosion, and Deposition by Water: Caves
Weathering, Erosion, and Deposition by Water: Caves
Caves can be formed by many processes, but erosion by water is one of the more common ways.

In Texas, we have many limestone caves. Water enters the caves and weathers the rock by dissolving the limestone.

When water levels rise, the minerals are carried away.

Calcium carbonate is deposited when water precipitates through the limestone.
Weathering, Erosion, and Deposition by Water: Delta
Okavango Delta
Natural Bridge Caverns
Weathering, Erosion, and Deposition by Water: Delta
A river delta forms at the mouth of a river.
The flowing river has weathered and eroded the river bank and the river floor, carrying the sediment in the moving water.
The sediment, that has been carried by the river, is deposited as the river flows into an ocean, sea, or estuary.
Weathering, Erosion, and Deposition by Wind: Sand Dunes
Weathering, Erosion, and Deposition by Wind: Sand Dunes
A sand dune can form from the movement of water or wind.
Most sand dunes have one side that is steeper than the other.
Wind direction
Movement of the sand dune
Weathering and Erosion by Wind: Hoodoos Pinnacles
Weathering and Erosion by Wind : Rock Arches
Weathering and Erosion by Wind : Rock Arches
Deep cracks form in sandstone. (Remember your observations of the frozen rock?)

Erosion wears away the exposed rock layers.

Water may enter the cracks, freeze, and widen the cracks further. Wind also wears away the rock particles.

Weathering and erosion continues until an arch, or bridge, remains.Over time, with continued weathering and erosion, the arches will collapse.
Weathering and Erosion by Wind
Weathering, Erosion, and Deposition by Wind and Water: Beaches
Weathering, Erosion, and Deposition by Wind and Water: Beaches
Beaches are the result of wave action.
Waves or currents move the sand (or other sediments along the shore).
Initially, the sediments on the beach were weathered and eroded from rock.
Wind carried the sediment, and it is deposited either on the land or in the water.
Sediment that is suspended in the water is carried in the water by ocean currents and eventually, may be deposited on the shore by waves.
The waves both deposit sand from the ocean bed and erode sand as the water pulls back into the ocean.
Weathering, Erosion, and Deposition by Wind and Water: Barrier Islands
Weathering, Erosion, and Deposition by Wind and Water: Sea Caves
Port Aransas
Laguna Madre
Government Canyon
Limestone= chalk activity
Boquillas Canyon
SPI= natural barrier provide protection to our coastline
Changes to land?
Changes to rock after freezing?
Changes over time?
Fast or Slow Change?
Predict type of rock? Justify
How was this landform created?
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