Answer | Crossword Clue |
---|---|
PERIOD | Geologic unit |
EON | Geologic time unit |
ERA | Geologic time unit |
EPOCH | Geologic time unit |
EON | Geologic-time unit |
AEON | Geologic time unit |
ERA | Unit of geologic time |
EPOCH | Unit of geologic time |
aeons | unit of geologic time equal to one billion years |
eons | unit of geologic time equal to one billion years |