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
What are 2 common biochemical sedimentary rocks?
limestone and coal
What are the tree types of sedimentary rock?
biochemical, chemical, detrital
Metamorphic rock is changed by a combination of which 3 things?
Heat, pressure, and chemical reactions
Which types of rocks can be changed by metamorphism?
Igneous, sedimentary, or metamorphic rocks
What is it called when metamorphic changes in rocks occur over large areas?
Regional metamorphism
What is it called when metamorphic changes in rocks occur over small changes?
contact metamorphism
When shale is compressed, which type of metamorphic rock is created?
slate
What are the two types of metamorphic rock textures?
Foliated and nonfoliated
Define foliated texture
Crystals that are arranged in layers and bands
Define nonfoliated texture:
rocks have crystals with more random orientation
Metamorphic rocks are mainly classified based on which two things?
texture and composition
Define rock cycle:
continual changing of rocks from one type to another
Which types of rocks are part of the rock cycle?
igneous, sedimentary, and metamorphic
What are the three types of rocks?
igneous, sedimentary, and metamorphic
Which type of rocks form from molten rock?
igneous
Which types of rocks are formed from clasts, precipitation, or compressed once living matter?
sedimentary
Which types of rocks are formed from heat, pressure, and chemical reactions?
metamorphic
What can form from hot water, evaporation, or molten rock?
minerals