chapter 26.3 Flashcards
define clasts
small rock and mineral fragments
What types of erosion are rocks on Earth’s surface exposed to?
- water
- wind
- other forces
What does it mean if clasts are being transported?
moved from one location to another
What does it mean if clasts are being deposited?
being dropped off
Define pore space
the empty space in between the grains/clasts
Define compaction
clasts stick together due to weight is on top of it
Define cementation
crystalizes in the pore spaces between clasts
How are sedimentary rocks formed?
clasts get compacted, water flows through the pore spaces, causing cementation
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
- silk
- clay/ mud
Which clast size would be deposited first?
gravel (heavier)
What are 4 common detrital sedimentary rocks?
- conglomerate
- sandstone
- siltstone
- shale
How are chemical sedimentary rocks formed?
dissolves solid mineral crystals pertisapate, evaporates
If sedimentary rocks contain remains of living organisms what are they called?
biochemical sedimentary rocks
