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Ordovician
Meaning
Adj
●
In Geology:
Of a
geologic
period
within the Paleozoic
era
;
comprises
lower,
middle
and
upper
epochs
from about 488 to 443
million
years ago.
Name
●
The Ordovician period.
Sourced from
Wiktionary
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Gondwana
Orogenic
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