Geologic Time Scale

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Across
  1. 2. Shorter time period within an Eon
  2. 4. First Era in the Phanerozoic Eon
  3. 6. Named after the god, Hades
  4. 8. The Eon consisting of 3 eras, covering the last 545 million years
Down
  1. 1. Second Era during the Phanerozoic Eon
  2. 3. The Earth's crust cooled during this Eon
  3. 4. The largest classified time period
  4. 5. most recent of the 3 geological eras from the Phanerozoic Eon
  5. 7. An immensely long time period on the geologic time scale