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Enquiry 1: Why are coastal landscapes different and what processes cause these differences
Terms in this set (31)
Horizontal layers of rock b(lyme regis)
Major weaknesses within rock layers either side of a fault rocks are heavily fractured which is exploited by marine processes (Kimmeridge)
Wavy layers of rock (lulworth cove)
Concordant (pacific coast)
Are generated when rock strata run parrallel to the coast
Discordant (Atlantic coast)
Form when different rock strata intersect the coast at an angle so geology varies along the coastline
Small mm-cm long cracks in rocks
Occur in most rocks often in regular patterns dividing rock strata into blocks of uniform shape.
Influenced by the resistance to erosion of the rock. The dip of the rock strata in relation to the coastline
Sand stone and lime stone. Quick erosion. Form under high temperature and pressure, layered rock. Made of sediment
Marble and slate. Medium rate of erosion. Form next to volcanoes. Heat on sedimentary rock changes the composition and the melting point of the rock.
Pumice and basalt. Cooling lava which from in or outside the volcano. No change in the composition.
Allow water to flow through them, include sandstone and limestone
Do not allow ground water flow and include clays mudstone and most igneous and metamorphic rock.
Water causing slumping
Water flows along the sand clay interface weakening the material leading to slumping
Coast,back shore, foreshore, nearshore, offshore
Rocky coast (cliffed)
Coastal plains (alluvial)
Where the coast are rising relative to sea level e.g due to tectonic uplift
Are being friended by the sea wither due to rising sea levels or subsiding land
Coasts with limited fetch and low fin speeds resulting in small waves
Exposed coasts facing prevailing winds with long wave fetches resulting in powerful waves
Marine erosion dominated
Steep face, active undercutting. Limited cliff base debris
Sub-aerial process dominated
Curved sloped profile, lower angle face, accumulated debris
Tempreture, expand and contract causes cracks.
Plants and animals
C02 dissolves in the rain eater making it acidic.
Movement down slopes of rock and soil due to gravity
Water from rain/snow melt or rain flow over the surface causing erosion
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