ROCK IDENTIFICATION. What type of rock is this? Where or how is it formed?

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Presentation transcript:

ROCK IDENTIFICATION

What type of rock is this? Where or how is it formed?

Marble  Metamorphic  Non-Foliated  Calcium Carbonate  Metamorphism of Limestone

Image Source What type of rock is this? Where or how is it formed?

Limestone  Sedimentary  Calcium Carbonate  Forms in clear, warm, shallow marine waters  Forms from the accumulation of shell, coral, algal and fecal debris

What type of rock is this? Where or how is it formed?

Granite  Intrusive Felsic Igneous Rock  Coarse Grained, can see crystals  Contains quartz and feldspar

What type of rock is this? Where or how is it formed?

Gneiss  Metamorphic  Foliated  Quartz and Feldspar in bands  Parent rock Granite

Image Source What type of rock is this? Where or how is it formed?

Coal  Organic Sedimentary Rock  Formed in ancient swamps in layers  Formed from plant remains

What type of rock is this? Where or how is it formed?

Obsidian  Extrusive Igneous Rock  Very quick cooling molten rock (lava)  Glassy  No crystals formed

Image Source What type of rock is this? Where or how is it formed?

Sandstone  Sedimentary Rock  Formed by the action of wind, water, and ice on older rock  Cemented by silica (quartz) or lime (calcium carbonate)  Most form in shallow seas or sand dunes

What type of rock is this? Where or how is it formed?

Pumice  Felsic Extrusive Igneous Rock  Quick cooling molten rock (lava)  No crystals formed  Many holes formed - gasses released  Floats on water

What type of rock is this? Where or how is it formed?

Scoria  Mafic Extrusive Igneous Rock  Forms as a frothy crust on the top of a lava flow or as material ejected from a volcanic vent and solidifying while airborne  No crystals formed  Many holes formed - gasses released

What type of rock is this? Where or how is it formed?

Basalt  Mafic Extrusive Igneous Rock  Formed from dark dense lava  Pyroxene, plagioclase feldspar  Fine grained

What type of rock is this? Where or how is it formed?

Slate  Foliated Metamorphic Rock  Metamorphism of Shale  Breaks into thin “slices”

What type of rock is this? Where or how is it formed?

Gabbro  Intrusive Mafic Igneous rock  Coarse grained crystals  Dense, greenish or dark-colored and contains pyroxene, plagioclase, amphibole, and olivine

What type of rock is this? Where or how is it formed?

Conglomerate  Sedimentary Rock  Rounded pebbles ¼ inch or larger cemented together  Formed near moving water  Quartz, quartzite

Review Can you compare and contrast the following sets of rocks?  Limestone and Marble  Granite and Gneiss  Limestone and Coal  Pumice, and Scoria  Basalt and Gabbro  Conglomerate and Breccia