ROCKROCKSS

ROCKROCKSS

http://www.youtube.com/watch?v=7SYQX_ygd2c

What is a Rock?What is a Rock?

Minerals or organic matter which have been• cemented together • squeezed together • heated together • melted and cooled together.

Rock TypesRock TypesIgneousSedimentaryMetamorphic

IGNEOUSIGNEOUS

•“Ignus” = fire

•From volcanoes

•Can be intrusive or extrusive

•In - “inside” (magma…from my secret volcano lair…)

•Ex - “out of” (lava)

•Granite

•Obsidian

•Intrusive•Cools inside Earth

•Extrusive•Where does this cool?

SEDIMENTARYSEDIMENTARY

•Formed from other rocks that have been broken apart by weathering and erosion

•Named by size & composition

•Conglomerate

•Sandstone

•Mudstone

Limestone (w/ fossils) Limestone (w/ fossils)

CoalCoal

METAMORPHICMETAMORPHIC

•“to change form”

•Caused by heat and/or pressure

•Limestone becomes marble

•Granite becomes gneiss

•Limestone

•Granite

•Marble

•Gneiss

Sedimentary

Rock

Igneous Rock

Metamorphic

Rock

Sediment

Sediment

MagmaLava

Weathering

Compaction and Cementation

Compaction and

Cementation

Weathering

Weathering

Melting

Cooling

Heat and/orPressure

Heat and/or Pressure

Minerals in CT rocksMinerals in CT rocks

•Feldspar (CT)

•Fluorite

•Mica (CT)

•Olivine

•Quartz (CT)

•Dolomite

•Graphite

•Calcite

•conglomerate - made of pebbles (larger pieces)

•sandstone - made of sand

•limestone - often include marine fossils (calcium carbonate…or “lime”)

•mudstone - made of mud

Sedimentary

Rock

Igneous Rock

Metamorphic

Rock

Sediment

Sediment

MagmaLava

WeatheringErosion

Compaction and Cementation

Compaction and

Cementation

WeatheringErosion

WeatheringErosion

Melting

Cooling

Heat and/orPressure

Heat and/or Pressure