Geologic History of the Earth

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Across
  1. 3. made up of all the fossils that have been found, along with their relative ages
  2. 4. a representation of time based on the rock record of Earth
  3. 5. measure the physical properties of an object itself and use these measurements to calculate its age.
  4. 7. the process of determining if one rock or geologic event is older or younger than another, without knowing their specific ages
  5. 8. the action or process of forcing a body of igneous rock between or through existing formations, without reaching the surface.
  6. 9. the study of sedimentary and layered volcanic rocks.
Down
  1. 1. any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment
  2. 2. types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface
  3. 6. layers of rock are superimposed, or laid down one on top of another
  4. 7. stacked-up layers of sedimentary rock.