2 types of sedimentary rock that forms from living organisms
Coal and Limestone
How is organic limestone formed?
is a type of rock that is made up of bits of animal shells. Over millions of years these shells collected on the ocean floor. As layers of shells and mud built up, the lower layers slowly hardened into limestone.
process that causes deposits of chemical sedimentary rocks like micrite and rock salt to form
4 examples of clastic rock
breccia, shale, sand stone, conglomerate
uses for sedimentary rock
cement, salt, chalk, paints, fuel, building materials
What processes cause the formation of metamorphic rocks?
Heat, Pressure and Chemical fluids
How do geologists classify metamorphic rocks?
by the arrangements of the grains that make up the rocks (foliated or nonfoliated) and parent material
How are metamorphic rocks used?
building materials and sculptures (marble)
Metamorphic rocks that have their grains arranged in parallel layers or ands are said to be ____________.
Examples of foliated metamorphic rocks
slate (most common), schist and gneiss
Examples of nonfoliated metamorphic rocks
marble and quartzite - they do not split into layers.
Granite (igneous) + heat and pressure = this metamoprhic rock
Gneiss (metamorphic, folicated)
Sandstone (sedimentary) + heat and pressure = this metamorphic rock
Quartzite (metamorphic, nonfoliated)
Shale (sedimentary) + heat and pressure = this metamorphic rock
Slate (metamorphic, foliated)
The Rock Cycle
the processes by which, over many years, Earth's materials form and change back and forth among igneous rocks, sedimentary rocks, and metamorphic rocks