Identifying Rocks

1
Identifying Rocks

• You will be identifying a number of rock samples.
  The following tables will help you organize the
  rock samples. Please copy these tables in your
  science journal.

2
Igneous Rock Samples
Igneous Rocks Igneous Rocks
Basalt (E) Pumice (E)
Scoria (E) Gabbro (I)
Granite (I) Obsidian (E)
Rhyolite (E) Porphyry (E I)
3
Igneous Rock Classification
Igneous Rocks Igneous Rocks Igneous Rocks
Intrusive Cools slowly Large crystals Porphyry Mixed cooling Mixed crystals Extrusive Cools quickly Small if any crystals
4
Sedimentary Rock Samples
Sedimentary Rocks Sedimentary Rocks
Chemical Limestone (Ch) Organic Limestone (O)
Shale (Cl) Conglomerate (Cl)
Sandstone (Cl) Coal (O)
Breccia (Cl) Dolostone (Ch)
5
Sedimentary Rock Classification
Sedimentary Rocks Sedimentary Rocks Sedimentary Rocks
Clastic (Pieces put together) Chemical Organic (Once living)
6
Metamorphic Rock Samples
Metamorphic Rocks Metamorphic Rocks
Slate (F) Schist (F)
Gneiss (F) Quartzite (NF)
Marble (NF)
7
Metamorphic Rock Classification
Metamorphic Rocks Metamorphic Rocks
Foliated (fold lines/ break lines) Non-Foliated
8
Use these tables to help you identify the rock
samples.

• Good Luck!