Types of rocks 0.0 / 5 ? GeologyRocksAll LevelsAll boards Created by: ChristinaCreated on: 21-01-14 10:24 Formed from the solidification of molten rock material. There are two basic types Igneous 1 of 12 These rocks can be modified by heat, pressure and chemical process usually while buried deep below Earth's surface. Metamorphic 2 of 12 Formed by the accumulation of sediments Sedimentary 3 of 12 A volcanic rock of mafic composition Basalt 4 of 12 A clastic sedimentary rock defined by its grain size Sandstone 5 of 12 A low grade metamorphic rock formed from shale or silts Slate 6 of 12 A metamorphosed limestone Marble 7 of 12 A sedimentary rock formed from clay Claystone 8 of 12 A sedimentary or tectonic rock composed of fragments of other, broken rocks Breccia 9 of 12 A felsic volcanic rock Rhyolite 10 of 12 A type of volcanic glass Obsidian 11 of 12 A sedimentary rock composed of clay and muds Mudstone 12 of 12
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