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This is a
container category
. Due to its scope, it should contain
only
subcategories
.
Categories by
geological period
.
See also:
Geology
Geology portal
Subcategories
This category has the following 3 subcategories, out of 3 total.
I
Impact craters on Earth by geological period
(16 C)
M
Magmatism by geological period
(14 C)
P
Prehistoric life by geological period
(5 C, 1 P)
Categories
:
Geological periods
International Commission on Stratigraphy geologic time scale of Earth
Categories by period
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