lithification of sedimentary rocks

sedimentary rock formation

Accumulated sediments harden into rock by lithification, as illustrated in the Figure 1.1. Two important steps are needed for sediments to lithify. 1. Sediments are squeezed together by the weight of overlying sediments on top of them. This is called com- paction. Cemented, non-organic sediments become clastic rocks. If organic material is included, they are bioclastic rocks. 2. Fluids fill in the spaces between the loose particles of sediment and crystallize to create a rock by cementation. The sediment size in clastic sedimentary rocks varies greatly (see Table in Sedimentary Rocks Classification). This cliff is made of sandstone. Sands were deposited and then lithified. Click image to the left or use the URL below. URL: Click image to the left or use the URL below. URL:

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questions

the creation of rock from sediments is called

a) solidification

-->  b) lithification

c) cementation

d) compaction

when fluid deposit ions create a rock that binds loose sediment it is called

a) solidification

b) lithification

-->  c) cementation

d) compaction

when sediments are squeezed together by the weight of sediments and rocks on top of them it is called

a) solidification

b) lithification

c) cementation

-->  d) compaction

clastic rocks contain fragments of pre-existing rock.

-->  a) true

b) false

the order of how sedimentary rocks are made is

-->  a) erosion, compaction, cementation, lithification

b) compaction, cementation, lithification, erosion

c) erosion, cementation, compaction, lithification

d) erosion, lithification, cementation, compaction

a mudstone that contains shell fragments is a bioclastic rock.

-->  a) true

b) false

the grains of sand in a sandstone are

a) the age the sands became a rock.

-->  b) the age of the rock that the grains weathered and eroded from.

c) all the same age.

d) none of these.

lithification creates

-->  a) clastic or bioclastic sedimentary rocks

b) igneous rocks

c) fossiliferous metamorphic rocks.

d) chemical sedimentary rocks

compaction is when cement from fluids bind sediments together.

a) true

-->  b) false

sandstone is a type of clastic rock.

-->  a) true

b) false

diagram questions

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