Rock Identification Key Worksheet
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Rock Identification Key Worksheet
Use this rock identification key
Start at Step 1 and follow the direction that matches the sample. Step 1: Does the rock have thin, flat layers? YES → shale. NO → Step 2. Step 2: Does it have rounded grains cemented together, often with a gritty feel? YES → sandstone. NO → Step 3. Step 3: Does it have visible, interlocking crystals? YES → Step 4. NO → basalt. Step 4: Are the crystals arranged in wavy or alternating bands? YES → gneiss. NO → Step 5. Step 5: Is it usually light-colored with coarse, speckled crystals? YES → granite. NO → marble.
- Whether it has rounded grains cemented together
- Whether it has visible, interlocking crystals
- Whether its crystals form wavy bands
- Whether it has coarse, speckled crystals
- Gneiss
- Basalt
- Granite
- Sandstone
2 printable pages
Page 1
Page 2
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