types of Rocks Flashcards
sedimentary
erosions collect in deposits which contain sediments which pressurize into a rock
compaction
weight of sediment layers force fluids out decreasing the space between grains
cementation
the dissolved minerals start to crystalize sticking the grains together to form rock
clast
pieces of mineral and rock fragments
clastic sedimentary
made up of pieces of clast
chemical sedimentary
minerals crystallize directly from water, has a dominent mineral
biochemical sedimentary
contains the remains of organisms and/or fossils
how does fossiliferous limestone form
from fossils and biochemical sedimentary
Extrusive igneous
when lava hardens, smooth uniformed look, can’t see individual grains
Intrusive Igneous
when magma hardens, has a rough look, you can see the individual grains and minerals because more time
what is granite
intrusive igneous
Contact Metamorphism
molten rock affects the surrounding rock making it bend
How are Metamorphic rocks formed
high pressure and temperature
Plastic Deformation metamorphism
permanent change in shape due to bending or folding
Regional metamorphism
chemical fluids act on large volumes of rock
Foliated metamorphic
plastic deformation- layers of light and dark composition usually elongated
Non-foliated metamorphic
minerals not aligned and crystals not interlocking
What is shist
foliated metamorphic
Can fossils be in meta. or igneous?
no because in igneous it would just disintegrate, and in metamorphic it could not withstand the high pressure and temp.
What is the rock cycle?
the changing of rocks into each other in different circumsatnces
