chapter 26.3 Flashcards
Define clasts.
Small rock and mineral fragments.
What types of erosion are rocks on Earths surface exposed to?
water, and other forces.
What does it mean if clasts are being transported?
They move to a new location, become round.
What does it mean if clasts are being deposited?
Being dropped off at a location.
Define pore space.
Empty space between grains.
Define compaction.
The process by which clasts stick together due to the weight of overlying material.
Define cementation.
Minerals precipitate slowly out of a water solution and crystallize in the spaces between clasts.
How are sedimentary rocks formed?
compaction and sedimentation.
What is another name for clasts?
Detritus.
What are sedimentary rocks called that are mostly made of clasts?
detrital sedimentary rock.
What is the decreasing size of clasts?
Gravel, sand, silt, or clay
Which clast size would be deposited first?
Gravel
What are 4 common detrital sedimentary rocks?
gravel, sandstone, silstone, and shale.
How are chemical sedimentary rocks formed?
they form from water that contains dissolved solids, mineral crystals precipitate out of a solution through evaporations
If sedimentary rocks contain remains of living organisms what are they called?
Bio-chemical sedimentary rock.
