Match each rock with the correct description. 1. cools quickly on the earth's surface clastic sedimentary rock 2. cools slowly beneath the earth's surface extrusive igneous rock 3. formed from the remains of living organisms chemical sedimentary rock 4. formed from pieces of other rocks cemented together metamorphic rock 5. formed when dissolved minerals harden intrusive igneous rock 6. formed from heat and pressure organic sedimentary rock