Rocks and Minerals Identification. I know a rock is sedimentary if: I see layers of sediment...

Rocks and Minerals

Identification

I know a rock is sedimentary if:

•I see layers of sediment cemented together OR•I see ripple marks OR•It looks like it’s made from salt OR•I see fossils OR•I see cobbles, pebbles and sand grains cemented together

I know a rock is igneous if:• I see randomly located interlocking crystals OR• I see “bubbles” where gases escaped as lava cooled OR• The texture of the rock is glassy because of rapid

cooling OR• I see very coarse grains (looks like a granite kitchen

counter top) OR• It’s shiny

I know a rock is metamorphic if:

• I see bands of light and dark minerals OR• I see distorted/folded, foliated structure OR• I see foliated “layers” of flaky minerals like mica OR• I see a very hard, dense, usually solid colored

boulder

Sedimentary, Igneous or Metamorphic???

How do you know?!?!There are sediments cemented together.

SEDIMENTARY(BRECCIA)


How do you know?!?!It has shiny minerals popping out.

METAMORPHIC(SCHIST)


How do you know?!?!It has coarse grains of different minerals.

IGNEOUS(GRANITE)


How do you know?!?!It has a glassy texture.

IGNEOUS(OBSIDIAN OR BASALTIC GLASS)

http://www.google.com/url?sa=i&rct=j&q=basaltic+glass&source=images&cd=&cad=rja&uact=8&docid=fryzsYqjCcVPaM&tbnid=xlaK8y0hGRB5lM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.brighthub.com%2Fenvironment%2Fscience-environmental%2Farticles%2F53133.aspx&ei=2q58U9n6GaTgsAT1rIHADg&bvm=bv.67229260,d.b2k&psig=AFQjCNFuOS1oUKjre0kcRI3mFx2VZWwZXQ&ust=1400766540633909


How do you know?!?!There are sea shells cemented together.

SEDIMENTARY(LIMESTONE -COQUINA)

http://www.google.com/url?sa=i&rct=j&q=coquina+limestone&source=images&cd=&cad=rja&uact=8&docid=1FvcUTp6tZeG5M&tbnid=niIgoH4uVRaUuM:&ved=0CAUQjRw&url=http%3A%2F%2Fskywalker.cochise.edu%2Fwellerr%2Frocks%2Fsdrx%2Flimestone-coquinaB.htm&ei=y698U4KcO_S1sASTqYCgDQ&bvm=bv.67229260,d.b2k&psig=AFQjCNGjvX_Il9Ysppb_GYTP5X-7RnNRWA&ust=1400766744129950


How do you know?!?!It is massive and it looks crystalline.

METAMORPHIC(MARBLE)

http://www.google.com/url?sa=i&rct=j&q=marble%20rock&source=images&cd=&cad=rja&uact=8&docid=TQD56JuK_MrSqM&tbnid=69RGRalbGfgcMM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.minimegeology.com%2Fhome%2Fmgeo%2Fpage_482_22%2Fwhite_marble_metamorphic_rock.html&ei=x7B8U_n3EtWrsAS8hIHgAw&bvm=bv.67229260,d.b2k&psig=AFQjCNHAUg_hyg3P4W1MJ5GIgXHEI43KkQ&ust=1400767014061892


How do you know?!?!It has layers. It has a gritty feel.

SEDIMENTARY(SANDSTONE)

http://www.google.com/url?sa=i&rct=j&q=sample+of+sandstone&source=images&cd=&cad=rja&uact=8&docid=lswvQoYh04LtLM&tbnid=C5ybqmcw9MoCzM:&ved=0CAUQjRw&url=http%3A%2F%2Fen.wikipedia.org%2Fwiki%2FJacobsville_Sandstone&ei=LbN8U_r1EsjKsATxmIHYCw&bvm=bv.67229260,d.b2k&psig=AFQjCNGRlb-1LK9Lb7gRTID3RpyvPZsJ2A&ust=1400767622296681


How do you know?!?!It has gas pockets.

IGNEOUS(PUMICE)


How do you know?!?!It looks like salt. Crystals were formed from evaporites and precipitates.

SEDIMENTARY(ROCK SALT)

http://www.google.com/url?sa=i&rct=j&q=rock+salt+sample&source=images&cd=&cad=rja&uact=8&docid=5KAgAHhzgDg96M&tbnid=mveIZWGCRoU0lM:&ved=0CAUQjRw&url=http%3A%2F%2Fgeology.com%2Frocks%2Fsedimentary-rocks.shtml&ei=M7t8U-3wF4q3sASYl4D4CQ&bvm=bv.67229260,d.b2k&psig=AFQjCNFjybx2cWZ7N9I8ewWViCVXMvWlOA&ust=1400769707618132


How do you know?!?!It is very dense. It is foliated.

METAMORPHIC(Slate)

http://www.google.com/url?sa=i&rct=j&q=slate%20rock&source=images&cd=&cad=rja&uact=8&docid=QOixU6YRxm6QxM&tbnid=co_GKw5Ju9wAMM:&ved=0CAUQjRw&url=http%3A%2F%2Flinlaoshi4thgrade.weebly.com%2Fslate-2649523721.html&ei=v8B8U4LmA4TLsASX7ILwAg&bvm=bv.67229260,d.b2k&psig=AFQjCNEv-2UQtXr3R-9T11IFqZLghpp_bg&ust=1400771128806417


How do you know?!?!It is lighter, less dense. You can see layers from compaction.

SEDIMENTARY(BITUMINOUS COAL)

http://www.google.com/url?sa=i&rct=j&q=bituminous+coal&source=images&cd=&cad=rja&uact=8&docid=aF1xEqV5uNIF5M&tbnid=wY9mnR0VARW6EM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.arrakis-group.com%2Fenergy%2Fcoal-sourcing-supply-chain-from-us-to-africa%2F&ei=ALx8U8O2KafLsQSu64Fw&bvm=bv.67229260,d.b2k&psig=AFQjCNH5XkAMHI6qr-_8TBERhwpzVkL69g&ust=1400769893461220


How do you know?!?!It has coarse grains.

IGNEOUS(DIORITE)


How do you know?!?!It has gas pockets.

IGNEOUS(SCORIA)


How do you know?!?!It has fossils.

SEDIMENTARY(SANDSTONE)


How do you know?!?!It has banding.

METAMORPHIC(GNEISS)

Rocks and Minerals Identification. I know a rock is sedimentary if: I see layers of sediment...

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