Rocks Study Slides
Igneous Rocks Look glassy Have air pockets Have interlocking crystals Name the igneous rocks on the following slides
Obsidian Looks glassy
Granite Has interlocking crystals
Scoria Has air pockets
Gabbro Has interlocking crystals
Pumice Air pockets
Rhyolite Has small interlocking crystals
Diorite Has interlocking crystals hint to remember: “Salt & Pepper” rock - it is light and dark (medium)
Sedimentary Rocks Are made of sediments Have fossils Are salty
Limestone Has fossils
Conglomerate Is made of sediments
Sandstone Is made of sediments
Coal Has fossils/is made of plant and animal remains
Siltstone Is made of sediments
Metamorphic Rocks Are foliated – Banding – Mineral alignment Are unfoliated – Have a “frosty/glazed” look
Gneiss Has banding hint to remember: Looks like a zebra and zebras are “nice” (gneiss)
Slate Has foliation
Marble Non-foliated (“frosty” look)
Schist Has foliation hint to remember: it is so pretty you want to touch it - the picture in your reference table looks like a thumbprint
Quartzite Nonfoliated (“frosty” look)
Quiz Yourself What things can you use to identify a sedimentary rock? What things can you use to identify an igneous rock? What things can you use to identify a metamorphic rock?