Rocks and Rocks and the Rock the Rock

CycleCycle

Let’s Review!!Let’s Review!! GrainsGrains TextureTexture ExtrusiveExtrusive IntrusiveIntrusive PorphyriticPorphyritic SedimentSediment ErosionErosion

DepositionDeposition CompactionCompaction CementationCementation Clastic rockClastic rock Organic rockOrganic rock Chemical rockChemical rock FoliatedFoliated

Sedimentary RockSedimentary RockForm from particles (sediments) deposited by wind and water.

Sediment undergoes the cycle of Erosion, Deposition, Compaction, and Cementation (or lithification)

There are three main types of Sedimentary rocks

Clastic, Organic, and Chemical

Sedimentary RockSedimentary RockHow Sediments are Deposited

Clastic Sedimentary Rock FormingClastic Sedimentary Rock Forming

IgneousIgneous Rock Rock Any rock that forms from magma or Any rock that forms from magma or

lava. (fire rock)lava. (fire rock) Can be extrusive or intrusive.Can be extrusive or intrusive. Classified according to its: Classified according to its:

Origin (Intrusive/Extrusive)Origin (Intrusive/Extrusive) Texture (fine/coarse grained, Texture (fine/coarse grained,

porphyritic, etc.)porphyritic, etc.) Mineral Composition (silica content)Mineral Composition (silica content)

IgneousIgneous Rock Rock How Igneous Rock Forms

Metamorphic RockMetamorphic Rock Changed RockChanged Rock Heat and pressure change any rock Heat and pressure change any rock

into metamorphic.into metamorphic. Classified by the arrangement of the Classified by the arrangement of the

grains: grains: Parallel bands: foliatedParallel bands: foliated Randomly: non-foliatedRandomly: non-foliated

Metamorphic RockMetamorphic Rock Metamorphic Rocks FormingMetamorphic Rocks Forming

Rock CycleRock Cycle Forces inside Earth and at the Forces inside Earth and at the

surface produce a rock cycle surface produce a rock cycle that builds, destroys, and that builds, destroys, and changes the rocks in the crust.changes the rocks in the crust.

Rock CycleRock Cycle The rock cycle The rock cycle

is the series of is the series of processes on processes on and beneath and beneath the Earth’s the Earth’s surface that surface that slowly change slowly change rocks from one rocks from one kind to kind to another.another.

Rocks ChangingRocks Changing Any rock can become any other rock in Any rock can become any other rock in

the rock cycle.the rock cycle.

The rock cycle can The rock cycle can progress through progress through many different many different pathwayspathways..

One example One example might include:might include: molten rock spews molten rock spews from a volcano and from a volcano and cools forming cools forming igneous rock, which igneous rock, which gets eroded and gets eroded and deposited as deposited as sedimentary rock sedimentary rock which gets pushed which gets pushed down further into down further into the crust and the crust and becomes becomes metamorphic.metamorphic.

Tell the PathwaysTell the Pathways