| A | B |
|---|
| coal | a type of organic rock |
| texture | the size shape or pattern of a rock's grains |
| clastic rock | sedimentary rock that forms when rock sediments are squeezed together |
| foliated | metamorphic rock whoes grains are arranged in parrallel layers or bands |
| igneous rock | rock that is formed from magma or lava |
| sedimentary rock | small solid pieces of material that came from rocks and living things |
| metamorphic rock | heat and pressure deep beneath earths surface can change any rock into this rock |
| limestone | began as coral can be found in places where uplift has raised acient sea floors above sea level/can be found on continents today |
| cementation | the process in which dissolved minerals crystallize and glue particles of sediment together |
| extrusive | formed when lava erupts onto earths surface |
| rock cycle | a seris of processes on and beneath earths surface that slowly change rocks from one kind to another |
| chemical rocks | they form when minerals that are dissolved in a solution crystallize |
| compaction | the process that presses sediments together |
| porphyritic texture | a rock with large crystals scattered on a backround of much smaller rocks |
| basalt | the most common extrusive rock; igneous |
| constructive and destructive | two forces that drive the rock cycle |
| organic rock | forms where the remains of plants and animals are deposited in thick layers |
| slate | a denser more compact version of shale |
| microscope | geologists often use one of these to determine a rocks mineral composition |
| color and texture | characteristics scientists use to identify rocks |
