creation of rocks
what type of rock is created when existing rocks are pushed deep inside earth.
Metamorphic rock
3 types of sedimentary rocks
chemical/clastic/organic
two types of sedimentary rocks
clastic and organic/crystallizing
1 type
contact metamorphism and heat
what characteristics do scientists use to classify rocks
texture and composition
rock created from cooled magma
Igneous rock
2 ways metamorphic rock is classified
foliated vs non-foliated/ texture
clastic
compacted sediments and classified by size
2nd type
regional metamorphism and pressure
2 examples each for extrusive and intrusive igneous rocks
extrusive: basalt, pumice
intrusive: diorite, Granite
rock formed when bits of sediment are compacted and cemented together
sedimentary rocks
2 things to look at when classifying igneous rocks
color/texture
organic/crystalline
eraporites and precipitates and biological matter
what is a parent rock
what the rock was before it was exposed to extreme amounts of heat and pressure
two things that happened in intrusive igneous
magma cools slowly and large crystals form
two processes sediments form
weathering and erosion
4 types of sedimentary rock sizes
boulders/cobbles stones/sand size/clay size
2 steps of sediments to sedimentary rocks
deposition and compaction or cementation and burial
this turns a metamorphic rock into sedimentary rock
what is erosion to sediments to burial
3 things that happen in extrusive rocks
lava cools quickly, small or no crystals form, have vesicles and contains air bubbles
how can any rock be formed into an igneous rock
if a rock is melted into magma
what do geologists call coarse texture
phaneritic
what it contains
contains many fossils of plants and animals
this is parent rock of schist
phyllite
examples of igneous rocks
diorite and Gabbro