Here's a breakdown of the rock types and their samples: Igneous Rocks Formed from cooled liquid magma, either deep in the earth or on the surface by volcanoes. Granite Lava (Scoria) Rhyolite Porphyry Obsidian Pumice Metamorphic Rocks Formed by varying degrees of heat and pressure on existing rocks. Gneiss Marble Mica Schist Anthracite Slate Quartzite Sedimentary Rocks Formed by the accumulation of sediments in water and air through erosion, precipitation, evaporation and compaction. Conglomerate Limestone Sandstone Travertine Shale Dolomite This collection provides a great educational tool for geology enthusiasts and students.
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