Ch 3: Weathering + Erosion Flashcards
Weathering
the breaking down of landforms on the spot
Erosion
the breaking down of rocks and removal of the particles
What is mechanical weathering?
breaking down with of rocks due to the action of the sun or frost
What is freeze-thaw action?
the break up of rock by frost action
What is chemical weathering?
breaking down of rock due to chemical changes within the rock
What is carbonation?
When carbonic acid weathers limestone and chalk
Features of Limestone
Strata, Bedding Planes. The rock is permeable
What is permeable?
It means water can pass through it
What are grimes?
The gaps on the surface of limestone
What are clints?
The resistant slab of limestone
Limestone pavement
Grikes and clints
What are swallow holes?
Rivers make their way underground via swallow holes
How is a cave formed?
When swallow holes continue to dissolve
What are stalactites?
Deposits of dissolved calcium carbonate that attach themselves to the roof of the cave
What are stalagmites?
Deposits of dissolved calcium carbonate that attaches themselves to the bottom of the cave
