Geography - Erosion/Transportation 0.0 / 5 ? GeologyerosionGCSEAQA Created by: LunaShomeiRoseCreated on: 31-12-18 15:18 what four types of river erosion is there? hydraulic action, attrition, abrasion and solution 1 of 14 What is Hydraulic action? his is the sheer power of the waves as they smash against the cliff. Air becomes trapped in the cracks in the rock and causes the rock to break apart. 2 of 14 what is attrition? this is when rocks that the sea is carrying knock against each other. They break apart to become smaller and more rounded. 3 of 14 what is abrasion? this is when pebbles grind along a rock platform, much like sandpaper. Over time the rock becomes smooth. 4 of 14 what's solution? this is when sea water dissolves certain types of rocks. In the UK, chalk and limestone cliffs are prone to this type of erosion. 5 of 14 what are the four types of transportation? Traction, Saltation, Suspension, Solution 6 of 14 Traction is when... (attraction - don't leave ground) where pebbles and larger material are rolled along the sea bed. 7 of 14 where is it most common? most common near the source of a river, as here the load is larger. 8 of 14 Saltation is when... (salt... bounces...?) where small pieces of shingle or large sand grains are bounced along the sea bed. 9 of 14 this is most common near the... source 10 of 14 Suspension is when... (suspended = carried) small particles (silts and clays) are suspended (carried) in the flow of the water. 11 of 14 where is this most common? near mouth of river where water is stronger 12 of 14 solution (erosion) is when rocks are dissolved into the water, but solution (transportation) is also a form of transportation. explain why when minerals in rocks like chalk and limestone are dissolved in sea water and then carried in solution. The load is not visible. 13 of 14 This varies along the river depending on the presence of ___ rocks. soluble (dissolvable) 14 of 14
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