Sedimentary-Limestone pavement

Question 1

Intro-limestone

Answer 1

◍organically formed sedimentary rock(made from ded sea creatures.
◍Forms linestone pavement-KArst
◍ Ex. The burren co.Clare

Question 2

Formation

Answer 2

◍Irish limestone-shallow sea-350to300 MYA (IE close to equator)
◍Ded creatures built up: shellfish+coral
◍Sand particles +mud also build up
◍Over time weight of sediments compressed grains together
◍water pushed out of pore spaces
◍grains cemented together w. calcium carbonate

Question 3

Pavement description

Answer 3

◍lithification-loose grain to rock
◍Sedimentary-contains strata,which are separated by bedding planes
◍Vertical joint present too
◍They formed IE moving northward plate movement
◍limestone-permable water passes through joins and bedding planes

Question 4

Limestone landscapes

Answer 4

◍limestone chemically weathered by carbonation
◍Carbonation-rainwater mixes w. co2 in air =weak carbonic acid- PH of 5.6

Question 5

Weathering and erosion

Answer 5

◍Rainwater passes through cracks
◍Erosion-widens+deepens cracks forming limestone pavement
◍joints deepen form grikes–separated by flat areas clints
◍Karrens-small pool of water erodes into rock
◍Fluting formed when water overflows+water runs down side of clint