Chapter 26.3 Flashcards
Define clasts
small rock and mineral fragments are called clasts.
What types of erosion are rocks on earths surface expose to
Rock on Earth’s surface are exposed to water, wind, and other forces.
what does it mean if clasts are being transported
they are become rounded
what does it mean if clasts are being deposited
physical disaggregation of preexisting rocks during weathering and mechanical erosion.
Define pore space
The empty space in between the grains is called pore space.
Define compaction
The process by which clasts stick together due to the weight of overlying material is called compaction.
Define cementation
Minerals precipitate slowly out of a water solution and crystallize in the spaces between clasts in a process called cementation.
how are sedimentary rocks formed
Most of the time both compaction and cementation work together to make sedimentary rock.
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
2mm
which clasts size would be deposited first
gravel
what are 4 common detrital sedimentary rocks
gravel, sand, silt, or clay.
how are chemical sedimentary rocks formed
Chemical sedimentary rocks form from water that contains dissolved solids.
if sedimentary rocks contain remains of living organisms what are they called
biochemical sedimentary rocks.
