Igneous
Igneous rocks are formed by the...
Solidification and cooling of magma
Sedimentary rocks are classified as...
Clastic, Organic and Chemical.
______ and ________ form metamorphic rocks.
Heat and Pressure.
Igneous
The five criteria for minerals are...
Naturally Occurring, Inorganic, Crystalline Structure, Definite chemical composition, Physical Properties
Chemical composition and texture.
We find fossils in sedimentary rocks because...
The two types of metamorphism are....
regional - found in large scale plutons and focus on pressure
contact - found in smaller scale plutons and focus on heat.
Magma
Major rock and minerals found in VA...
Coal, Limestone and Titanium.
Intrusive rocks are ____ to cool and _______ in texture.
Extrusive rocks are ______ to cool and _______ in texture.
Slow; Coarse
Quick; Fine
Describe lithification and the two types.
Lithification is the gluing together of rocks.
Compaction - pores pushed together by weight of sand
Cementation minerals in water cement it together
Metamorphic rocks are classified by...
Foliation or non-foliation
Number 3 on the Rock Cycle
Metamorphic Rock
Hardness, Density, Streak, Luster, reactivity with acid.
Differentiate between Mafic and Felsic Rocks.
Felsic - light colored; silica rich; Fe and Mg poor
Mafic - dark colored; Fe and Mg rich; Silica poor
Describe sorting and how if affects the depositional environments.
Sorting - angular sand falls from parent rocks and stops whereas streams create the rounded rocks.
Depositional environments - mountains have boulders energy of water can't move them so created into cobbles, as goes into flatter area (not fully) turns into cobbles and pebbles and the flattest area can only hold onto silt, sand and clay.
The parent rocks of slate, marble and quartzite are...
Shale, Limestone and Sandstone.
Number 4 on the Rock Cycle
Sediment
Graduated cylinder and balance
4 examples of intrusive Igneous Rocks
Granite, Diorite, Gabbro and Peridotite
Coquina is made from...
made from shells around the reef areas - animals and materials that pull calcium carbonate out of water column, secreted it and formed a hard shell
List the rocks found in the prograde metamorphism and explain the grade.
Shale (sedimentary) -> Slate (low-grade met) -> Phyllite (moderate met) -> Schist (high grade) -> Migmatite - Magma
Number 5 on the Rock Cycle
The softest mineral on the moh's hardness scale is _____ and the hardest is ________.
Talc; Diamond