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
| G | X | H | H | B | N | A | I | M | R | E | P | K | B | M |
| X | C | A | I | N | O | Z | I | O | C | S | I | O | A | N |
| O | R | A | P | A | L | A | E | O | Z | I | O | C | F | X |
| O | E | D | R | X | R | Z | G | C | H | P | R | Z | T | D |
| C | T | U | E | B | Q | T | H | H | B | Y | Q | U | R | W |
| O | A | Y | C | J | O | R | D | O | V | I | C | I | A | N |
| I | C | R | A | I | B | N | U | E | A | E | C | X | U | A |
| Z | E | A | M | C | S | K | I | J | V | D | S | A | I | L |
| O | O | I | B | Q | G | S | E | F | F | O | A | H | P | H |
| S | U | T | R | L | I | O | A | R | E | V | N | O | P | B |
| E | S | R | I | T | S | A | H | I | E | R | L | I | O | F |
| M | G | E | A | T | L | F | U | P | R | X | O | L | A | R |
| M | T | T | N | Y | R | A | N | R | E | T | A | U | Q | N |
| O | S | G | A | A | I | N | A | I | R | U | L | I | S | V |
| X | Y | P | D | Z | J | H | J | U | R | A | S | S | I | C |
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