Denudation Flashcards
What is denudation
When the earths crist is cahnged due to weatering and erosion
What is weathering
When rocks are broken down and stay in the same place there are two types of this chemical and physical
What is erosion
When rocks are broken down and are transported by river,wind,ice p
What is an example of mechanical weathering
freeze thaw action
What is machanical weathering
when the rock is broken into little pieces
What is chemical weathering
chemical weathering is when the rocks are dissolved because of a chemical reaction
What is acid rain made from
As rain frms it takes in carbon dioxide from the atmosphere.The rain water then mixes with the carbon dioxide forming a weak carbonic acid
Why is limestone effected by acid rain
because limestone contains 80% calcium carbonate.The weak cobanic acid reacts with the calcium carbonate and the limestone dissloves because it is permeable and soluble.
What is a Karst landscape
Carbonation occurs when an area of bare limestone rock os exposed to the weather
Name two karst landscape
Karst in Slovenia and the bipurren Co.Clare
What does a karst landscape result in
Unique landforms both abocpve and below land
What is a swallow hole
Rivers also dissolve limestone.A river may begin ina non-limestone area,can dissapear underground when it reaches limestone on the surface.This occurs because the water widens the joints and bedding planes of the limestone rock through carbonation.the river will then disappear underground through a swallow holes.Swallow holes vary in size depending on how large of small the river in it is .
Name a swallow hole
Pollnagollum swallow hole burren co clare
What is a cave and carverns
As riversflow underground through swallow holes, carvpbonation enlarges the passages through which they flow to make caves.Some of these cavescan further widen to create chambers and carverns.
Name a cave
alvee caves burren co.clare
How are stalactites formed
As the water seeps through the rocks, it carries dissolved limestone with it.Some of this water eventually reaches the roof of the cave or cavern below ground.The drops slowly evaporate and leave behingpd small diposits of pur limestone called calcite.Gradually the calcit up to form hollow icicle shapes called stalactites that hang from the roof.
How are stalagmittes formed
The drops of water of the stalactites may also fall on the ground and evaporate,leaving deposits of calcite on the flloor of the cave directly under the stalactites.The calcite builds up forming stalagmittes
How are pillars made
When a stalagmitte and a stalactites meet
