Please enable JavaScript.
Coggle requires JavaScript to display documents.
rocks - Coggle Diagram
rocks
sedimentary rocks (rocks formed by compression)
bioclastic
if you find a fossil in a rock, it is bioclastic.
also can make diamonds-yay!
made of compacted organic materials
some bioclastic rocks include:
limestone
coal
evaporite/crystalline
also when it crystallises when formed at the bottom of saturated water.
a rock is crystalline when it is left behind when water evaporates.
some evaporites include:
gypsum
rock salt
anhydrite
clastic
when a certain type of stone is weighed down by more stones/ water, it will compact into a layered clastic rock.
the simplest of sedimentary rocks.
some clastic rocks include:
shale
sandstone
breccia
igneous rocks
(rocks formed by the cooling of magma or lava)
intrusive
large crystals (1 mm+)
often quite large due to the amount of time spent under the crust
forms very slowly under the crust in magma
some intrusive rocks include:
diorite
dunite
granite
pigmite (sounds like a disease...)
extrusive
very small, or maybe even no crystals
sometimes has air bubbles if it forms fast enough
formed quickly above the crust in lava
some extrusive rocks include:
obsidian
pumice
basalt
andesite
rhyolite
metamorphic rocks (rocks formed by both extreme heat and compression)
contact
a reliatively small area of effect, from 1 to 10 kilometers.
rocks that have had lava or magma in contact with them
some contact rocks include:
anthracite
hornfels
quartzite
marble
they get infused with the lava/magma
regional
rocks formed during mountain building
some regional rocks include:
slate
shist
shale
phyllite
usually exposed to enormous amounts of pressure
compressed and heated to the point of metamorphisim