26.3 Flashcards
Define Clast
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?
it means that its being moved from one location to another
What does it mean if clasts are being deposited?
It means to be dropped off
define pore space
empty spaces in between the grains
define compaction
compaction is where clasts stick together due to the weight of overlying materials
define cemenation
where minerals precipitate slowing out of a water solution and crystallized in the spaces between clasts i
how are sedimentary rocks formed?
It starts with clast make it 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
what is the decreasing size of clasts?
gravel, sand, silt, or clay
which clast size would be deposited first?
gravel (heavier material)
what are 4 common detrital sedimentary rocks?
sandstone, siltstone, shale, conglomerate
how are chemical sedimentary rocks formed?
They form when water that contains dissolved solids and mineral crystals precipitate out of a solution through evaporation
if sedimentary rocks contain remains of living organism what are they called?
Biochemical sedimentary rocks
