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Lower Carboniferous period
DEFINITIONS OF:
Lower Carboniferous period
1
n
from 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects
Synonyms:
Lower Carboniferous
,
Missippian period
,
Mississippian
Example of:
geological period
,
period
a unit of geological time during which a system of rocks formed
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