Rocks
Terms
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- magma
- molten rock located below the surface of earth (heat, pressure released, fluids will enter into rock)
- organic sedimentary rock
- when sea shells, skeletal remains are cemented togeather
- metamorphic rock
- undergo a change in their structure
- deposition
- sediments building up into thick layers
- regional metamorphosis
- weight over lying rock layers cause increase in pressure and heat
- chemical weathering
- caused by oxygenation hydrolysis and carbonation
- intermediate
- mixture of felsic and mafic (dirite)
- contact metamorphosis
- rock comes in contact with magma, does not melt but heat and pressure cause the rock to change
- batholiths
- huge pools of magma in crust of earth
- ultramafic
- low in silica (basalt)
- laccoloths
- dome shaped intrusive formations that form like sills does but the center of it bulges upward
- igneous rock
- form when magma or lava cools and hardens
- plutons
- balloon shaped, dome like igneous formations
- fast cooling
- small grains
- lava
- molten rock spilling on the surface of the earth
- Rock
- solid mixture of crystals compsoed of one or more minerals
- compaction or cementation
- sediments are squeezed and solidified into sedimentary rock
- dykes
- vertical, wall like intrusive formations form when magma fills vertical cracks, cools, and hardens
- causes of erosion
- gravity, running water, wind, ocean weaves, glaciers
- felsic
- high in silica, light in color (rhyolite)
- sills
- large ,flat intrusive formations form when magma fills between rock formations
- volcanic neck
- remnants of magma left behind after the cone of the volcano has been eroded away
- mechanical weathering
- caused by wedging root pry and temperature
- slow cooling
- large grains
- mafic
- high in maagnesium and iron, low in silica, dark in color (obsidian)
- non foliated
- have no layers in texture
- chemical sedimentary rock
- when sediments are cemented togeather by chemicals dissolved in water
- Factors of weathering
- climate(hot fast, cold slow), surface area of rock (large fast, small slow) chemical compositions, pollution
- foliated
- have layers in texture
- erosion
- transportation of sediments
- weathering
- rocks broken down into smaller pieces
- clastic sedimentary rock
- form when different size sediments are compacted togeather