26.3 Flashcards
Define clasts
Small rocks and mineral fragments.
What type of erosion are rocks on Earth’s surface exposed to?
Water, wind, & other forces.
What does it mean if clasts are being transported?
Its being moved from one place to another.
What does it mean if clasts are being deposited?
Being put away
Define pore space
The empty space in between the grains.
Define compaction
Clasts stick together due to the weight of overlying material.
Define cementation
Minerals precipitate out of a water solution and crystallize in the space between clasts in a process.
How are sedimentary rocks formed?
Clasts get compacted together water moves between causing cementation.
What is another name for clasts?
Detritus
What are sedimentary called that are mostly made of clasts?
Detrital sedimentary rock
What is the decreasing size of clasts?
Gravel, sand, silt, mud/clay
Which clast size would be deposited first?
gravel
What are 4 common detrital sedimentary rocks?
Conglomerate, sandstone, siltstone, shale
How are chemical sedimentary rocks formed?
Water that contains dissolved solids and then mineral crystals precipitate out of solution.
If sedimentary rocks contain remains of living organisms what are they called?
Biochemical sedimentary rocks
