Metamorphic
How do metamorphic rocks form?
temperature and/or pressure
what are the igneous rock types?
-hint- NOT types of rock... 4 rock types
-ultramatic
-basaltic
-andesitic
-granitic
what is sediment?
loose materials such as rock fragments, mineral grains, and bits of shells that have been moved by wind, water, ice, or gravity
what is a phaneritic texture?
large (coarse) mineral grains (visible to bare eye)
what are the two textures of metamorphic rocks?
foliated (banded) and non-foliated
how do igneous rocks form
crystallization of molten material
what are the 3 types of sedimentary rock?
-detrital (clastic)
-chemical
-organic (biochemical)
what is an aphanetic texture?
small (fine) mineral grains
-or glassy
-or vesicular (gas bubbles)
what is a parent rock?
the original rock before metamorphism
what are the TYPES (2) of igneous rock
-intrusive
-extrusive
what are detrital rocks?
sedimentary rocks made up of pieces of other rocks
what are chemical rocks?
-from when dissolved minerals come out of solution
what type of rocks can parent rocks be?
igneous, sedimentary, or metamorphic
where do intrusive and extrusive igneous rocks form?
intrusive- deep inside the earth
extrusive- near the earth's surface
what are organic (biochemical) rocks?
rocks made of the remains of once-living things
what are Mafic or basaltic rocks?
Dense, dark colored
High iron and magnesium, low silica
Vesicular basalt, peridotite
what are some examples of metamorphic rocks?
-gneiss
-marble
-slate
-quartzite
-schist
what textures can igneous rock have?
-vesicular (gas pockets)
-glassy
-aphanetic
-phaneritic
what are examples of igneous rock?
-sandstone
-soapstone
-conglomerate
-fossil limestone
-bituminous coal
-limestone
-halite (rock salt)
what are Felsic or granite rocks?
Low density, light-colored
High silica, low iron and magnesium
Lots of silica makes the rock stiff
Granite, obsidian- volcanic glass