Igneous rocks are formed from the cooling and the solidification.Intrusive rocks form underground from magma.Extrusive rocks form above above the ground from lava .Example of Igneous rocks are diorite, gabbro, granite, pegmatite, and peridotite.
Sedimentary rocks Are composed of compacted and cemented sediments with particles of various sizes . Formation Environments are Near shore, lakes, ponds, and dessert. What it is made of Mud, sand, shells, and fossils. Examples of Sedimentary rocks are mudstone, limestone, sandstone, and conglomerate.
Metamorphic rocks Form when any rock type is changed by the earth’s high temperature and pressure. Method of change Dynamic squeezing the rocks Thermal cooking the rocks.w\ What to look for foliated Lines and bands Non-foliated No lines or bands. Example Metamorphic Rocks are composed of quartz, feldspar and mica.