GEOL 1212 - Assign 2 The Rock Cycle - http://www.mineralogy4kids.org/rockcycle/r

Question

GEOL 1212 - Assign 2

The Rock Cycle - http://www.mineralogy4kids.org/rockcycle/rockcycle.html

Igneous Rock Identification Chart - http://www.mineralogy4kids.org/rockcycle/igid.html

Rock Key - http://www.rockhounds.com/rockshop/rockkey/

Rock identification charts - http://jersey.uoregon.edu/~mstrick/MinRockID/RockID/RockIDChart.html

Mineralogy 4 Kids - http://www.mineralogy4kids.org/

GEOL1212 Assignment 2 Rock Detective You are in search of three common rocks. You'll be given 3 clues to help you determine which rocks you have. Use your text (Ch. 2) and the web links provided to help you The chart below lists the minerals often found in these rocks. Study the mineral clue list and use the provided web links to determine 3 possible answers (a., b., c.) for each sample number Clue #1: Number Mineral Clue List Rock This rock is composed of the following minerals calcite or microscopic crystals of calcite This rock is composed of the following minerals 2 mostly clay (kaolin); some mica This rock is composed of the following minerals quartz, orthoclase, feldspar, mica, hornblende or amphibole Clue #2: Rock classification. Now that you've listed 3 potential rocks you will now use the information listed below to help you narrow down your rock choices from Clue #1 above. For example, Number 1 from Clue 1 is a sedimentary rock, which of the rocks from a., b., and c. above are sedimentary? Number 1 (sedimentary rock) a. Number 2 (sedimentary rock) a.

Explanation / Answer

Answer- clue 1

Rock composed of calcite mineral or microscopic mineral

of calcite

clue 2- Sedimentary rock- limestone and Aragonite composed of Calcite and microscopic calcite mineral

Sedimentary rock- Shale, mudstone, Argillite extremely fine grained rock composed of clay mineral and some mica, extremely soft in nature

Metamorphic rock- Slate, Phyllite,

Clue3-

1- a- formed from tiny crystal of calcite precipitated from sea or lake water

b- has not been altered by high pressure

Final answer- Aragonite or coral reef, Limestone

2- a- smooth, soft easily broken,

b- finely ground form used in making bricks and tiles

Final answer- Shale,

3- a- formed from granite

b- Has foliated or coarse, parallel band of alternate light and dark color

Final answer- Gneiss

Serial no mineral clue list Rock name 1

Rock composed of calcite mineral or microscopic mineral

of calcite

Limestone, Marble, Aragonite 2 rock composed of mostly clay and some mica Shale, slate, Phyllite, mudstone, Argillite 3 rock composed of Quartz, Feldspar, Orthoclase, Mica, Amphibole or Hornblende Granite, Rhyolite, Rhyolite Tuff

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