Sedimentary rock

Question 1

Lithification

Answer 1

the physical and chemical processes that transform sediemtns into sedimentary rocks.

Question 2

deposition

Answer 2

when sediments sink to the bottom of a body of water. This causes layers of sediments to layer on the bottom. Order going larger particals then smaller particles.

Question 3

Compaction

Answer 3

the process in which the volume and porosity of a sediment is decreased by the weight of overlying sediments as a result of burial beneath over sediments.

Question 4

Clastic

Answer 4

formed from deposits of loose sediments that accumulate over time on earths surface.

Question 5

Conglomerate

Answer 5

rocks that are composed of rounded fragments. Ranged in size from mud to boulder.

Question 6

Breccia

Answer 6

a conglomerate rock but with sharp and angular corners

Question 7

Coarse grained rocks

Answer 7

Said of a crystalline rock, and of its texture, in which the individual minerals are relatively large

Question 8

Medium grained rocks

Answer 8

sandstone- that has been cemented together with sand sized particles.

Question 9

Porosity

Answer 9

The percentage of open spaces between grains in the rocks. sandstone can have up to 30%

Question 10

Fine-grained rocks

Answer 10

Clay, shale, mudstone, siltstone and slate (cemented together with clay sized particles)

Question 11

Chemical sedimentary rocks

Answer 11

sedimentary rock that forms when minerals precipicate from a solution or settle from suspension.

Question 12

Bio chemical sedimentary rocks

Answer 12

sedimentary rocks that form from the remails of once living plants or animals.

Question 13

examples of biochemical rocks

Answer 13

limestone (mainly calcite) and coal (mainly carbon)