Finding Time
Geological time: Eras and Periods
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CAINOZIOC
CAMBRIAN
CARBONIFEROUS
CRETACEOUS
DEVONIAN
JURASSIC
MESOZIOC
ORDOVICIAN
PALAEOZIOC
PERMIAN
PRECAMBRIAN
QUATERNARY
SILURIAN
TERTIARY
TRIASSIC
| O | O | Z | Z | Q | J | U | R | A | S | S | I | C | V | Y |
| Z | C | A | I | N | O | Z | I | O | C | J | Q | C | S | Z |
| C | R | A | I | D | C | Y | Q | L | U | W | A | H | L | E |
| O | E | P | R | E | C | A | M | B | R | I | A | N | B | U |
| I | T | A | E | B | I | H | A | B | K | G | K | Y | E | J |
| Z | A | L | Y | R | O | R | D | O | V | I | C | I | A | N |
| O | C | A | G | R | M | N | M | E | Q | H | Z | K | C | V |
| S | E | E | S | F | A | I | I | Z | V | N | M | T | B | A |
| E | O | O | I | A | X | I | A | F | B | O | E | R | X | D |
| M | U | Z | O | T | Z | N | T | N | E | G | N | Q | D | K |
| I | S | I | C | Z | D | H | M | R | G | R | Y | I | O | Y |
| F | F | O | P | J | S | K | C | W | E | N | O | E | A | G |
| Z | O | C | N | Y | R | A | N | R | E | T | A | U | Q | N |
| L | X | J | D | H | Z | N | A | I | R | U | L | I | S | Y |
| F | Y | G | E | T | R | I | A | S | S | I | C | C | F | E |
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