Ch 26.3 Flashcards
Define clasts
Small rock and mineral fragments
What types of erosion are rocks on Earths surface exposed to?
Water, wind, and other forces
What does it mean if clasts are being transported?
They are moving to new locations
What does it mean if clasts are being deposited?
They are left on earths surface
Define pore space
The empty space in between grains
Define compaction
The process by which clasts stick together due to the weight of overlying material
Define cementation
A process where minerals precipitate slowly out of a water solution and crystallize in the spaces between clasts
How are sedimentary rocks formed?
When compaction and cementation work together
What is another name for clasts?
Detritus
What are sedimentary rocks called that are mostly made of clasts?
Detrital sedimentary rocks
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?
Conglomerate, sandstone, siltstone, and shale
How are chemical sedimentary rocks formed?
From water that contains dissolved solids
If sedimentary rocks contain remains of living organisms what are they called?
biochemical sedimentary rocks
