chapter 26.3 , 26.4 Flashcards
Define clasts
Small rock and mineral fragments
What types of erosion are rocks on Earth’s surface exposed to?
Water, wind and other forces
What does it mean if clasts are being transported?
Being moved from one place to another
What does it mean if clasts are being deposited?
Being dropped off
Define pore space
Empty spaces found between clasts
Define compaction
The process which clasts stick together due to the weight of overlaying material
Define cementation
Mineral precipitate slowly out of a water solution and crystallizes in the spaces between clasts
How are sedimentary rocks formed?
Clasts get compacted, water flows through, causing cementation
What is another name for clasts?
detrius
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/mud
Which clast size would be deposited first?
gravel
What are 4 common detrital sedimentary rocks?
conglomerate, sandstone, siltstone,
How are chemical sedimentary rocks formed?
Chemical sedimentary rock forms when mineral constituents in solution become supersaturated and inorganically precipitate
If sedimentary rocks contain remains of living organisms, what are they called?
biochemical sedimentary rocks