Rocks
By: Jasmine Jones
Rocks
Igneous Rock
Location of formation - In or outside a volcano
Main types and how each type is formed - Intrusive- Inside a volcano; Extrusive- Outside a volcano
Sedimentary Rock
Location of formation - At or near earth's surface
Main types and how each type is formed - Clastic- Made up of different sized paticles cemented together; Bioclastic- rocks formed by the accumulation of plant and animal remains
Metamorphic Rock
Location of formation - Deep within the earth
Main types and how each type is formed - Regional Metamorphism- Large masses of rock changed by deep burial within earth; Contact Metamorphism- Chemical and physical change to a rock caused by nearby intrusion or extrusion of molten rock
Granite
Texture and Crystal size- Coarse and 1 mm to 10 mm
Vesicular or Non Vesicular- Non Vesicular
Color, Density, Composition- Light, Low, Felsic
Percent of each mineral present- Potassium feldspar- 25%, Quartz- 40%, Plagioclase Feldspar- 20%, Biotite- 10%, Amphibole- 10%
Sandstone
Grain Size- 0.006 to 0.2
Composition- Quartz, Feldspar, Clay minerals, may contain other rocks and minerals
Comments- Fine to Coarse
Phyllite
Grain Size- Fine to Medium
Composition- Mica, Quartz, Feldspar, Amphibole, Garnet
Type of Metamorphism- Regional
Comments- Foliation surfaces shiny from microscopic mica crystals