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Peridiotite

Igneous Rock

Phaneritic Texture

Ultra-mafic

Green tint (Olivine)

Sugary look

[image]

Granite

Igneous Rock

Phaneritic Texture

Felsic Composition

Made of pinks, whites and blacks (K-spar)

Don't confuse with Gabbro

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Basalt

Igneous Rock

Aphantic Texture

Mafic Composition

"Just a sad little black rock"

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Diorite

Igenous Rock

Phaneritic Texture

Intermediate Composition

Salt and Pepper

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Andesite

Igneous Rock

Porphyritic Texture

Intermediate Composition

Greenish tint

Named after Andes mountains

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Gabbro

Igneous Rock

Phaneritic Texture

Intermediate Composition

Looks like a black countertop.

"black granite"

[image]

Obsidian

Igneous Rock

Glassy Texture

Mafic Composition

Glassy, smooth.

Can be other colors

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Scoria

Igneous

Porphyritic

Mafic

Comes in reds and browns

Looks like a moon rock

[image]

Pumice

Igneous

Porphyritic

Felsic

Light colored, pysically light

[image]

Volcanic Breccia

Igneous

Fragmental?

Flesic-Intermediate

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Vesicular Basalt

Igneous

Vesicular

Mafic

It's basalt. With holes.

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Porphyritic Rhyolite

Igenous

Porphyritic

Felsic

Light-weight

Small black flecks

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Slate

Metamorphic

Foliated

Parents: Claystone, Shale

Like shale, but with larger chunks

[image]

Phyllite

Metamorphic

Foliated

Parents: Claystone, Shale, Slate

Looks like eyeliner.

Lab samples are greenish

[image]

Schist

Metamorphic

Foliated

(Claystone, Shale, Slate, Phyllite)

Scaly-looking

Can include Garnets and Micas in flakes

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Gneiss

Metamorphic

Foliated

(Claystone, Shale, Slate, Phyllite, Schist, Granite)

Trash-can rock

Bands of dark and light

Lab samples have thin dark bands

[image]

Quartzite

Metamorphic

Nonfoliated

(Sandstone)

Looks kinda flaky

Grayish with some browns and reds

[image]

Marble

Metamorphic

Nonfoliated

(Limestone)

Reacts to HCL

Can have banding

Is multicolored, but primarliy light

[image]

Serpentine

Metamorphic

Nonfoliated

(Peridiotite, Basalt, Gabbro)

Greenish tint

Some banding possible

[image]

Anthrocite

Metamorphic

Nonfoliated 

(Coal)

Looks like lead

Shiny and dark

[image]

Hornfels

Metamorphic

Nonfoliated

(Any)

Ugly black w/ Brown circular things

[image]

Metaconglomerate

Metamorphic

Nonfoliated

(Conglomerate)

Breaks across grains, not around

[image]

Chert

Sedimentary

Chemical

No visible grains, maybe a few inlaid flecks

Almost glassy, light colored

[image]

Claystone

Sedimentary 

Detrital

Blobby

Very soft

[image]

Conglomerate

Sedimentary

Detrital

Large grains in lithified rock

Rounded grains

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Arkose

Sedimentary

Detrital

Feels like sandpaper

Rounded rock pieces inside of a reddish rock

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Sandstone

Sedimentary

Detrital

Cubed, sand pieces

Very small grains

Can be white, yellow, or red

[image]

Shale

Sedimentary

Biochemical

Breaks in layers

Very small grains, black

[image]

Micrite

Sedimentary

Biochemical

Reacts to HCL

No visible grains

Caramel-colored

Microfossils

[image]

Fossiliferous Limestone

Sedimentary

Biochemical

Reacts to HCL

Grayish with large fossil pieces

[image]

Bituminous Coal

Sedimentary

Biochemical

Black, shiny coal

layered

[image]

Chalk

Sedimentary

Biochemical

Reacts to HCL

Looks like chalk??

Very soft and light

[image]

Breccia

Sedementary

Detrital

Large, angular pieces lithified

(Looks like a snickers bar in lab sample)

[image]

Siltstone

Sedimentary

Detrital

Small grained, breaks in cubes

gritty taste

grayish with whites

[image]

Rock Salt

Sedimentary

Chemical

Looks like salt

tastes like salt

is salt

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Travertine

Sedimentary

Chemical

This is the one that looked like a stalagtite

Banding

Might react to HCL

[image]

Coquina

Sedimentary

Biochemical

Reacts to acid (doesn't matter though, because...)

Oatmeal

Oatmeal

Yucky oatmeal

[image]

Lignite

Sedimentary

Biochemical

Dull coal