By jacbo, Updated
im an igneous rock i form from quickly cooled lava or slowly cooled magma. there are intrusive rocks quickly cooled by air or water. there are also extrusive rocks that slowly cool in earth. an intrusive rock is obsidian, an extrusive rock is granite.
im a sedimentary rock im made of sediment after it goes through cementation and compaction. my sediment got to my birthplace through erosion once it gets moved by water or wind. finally the sediment began from rock abrasion when two rocks rubbed together.
im a metamorphic rock i formed from a igneous rock after a lot of heat and pressure came on to me. i have ben released finally after the long time i needed.
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