A geological period extending from from 310 million to 345 million years ago; it was associated with an increase of land areas, the presence of primitive ammonites, and emergence of winged insects; called also Missippian period and Lower Carboniferous period.
A period of the Paleozoic era (320-286 million years ago) after the Devonian and before the Pennsylvanian.
The first of the two Geologic Ages of the Carboniferous Period extending from about 345 to 310 million years ago.
from 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects
Unit of rocks in the lower Carboniferous, named by American geologist A. Winchell who was working in the Mississippian Basin .
A period of the Paleozoic era, spanning the time between 360 and 325 million years ago. It is named after the Mississippi River valley, which contains good exposures of rocks of this age.
Pertaining to the Mississippian Period, which began 340 million years ago and ended 320 million years ago.
A period of the Paleozoic era (after the Devonian and before the Pennsylvanian), thought to have covered the span of time between 345 and 320 million year ago; also, the corresponding system of rocks
Geologic period that occurred roughly 320 to 360 million years ago. During this period, insects undergo major speciation and ferns first appear. Trees become a dominant plant form on continents.
the fifth period of the Paleozoic era, after the Devonian and before the Pennsylvanian; Lower Carboniferous (the name used outside of North America); the rocks formed during this period. [AHDOS
The Mississippian is an epoch of the Carboniferous period lasting from roughly 360 Ma to 325 Ma (million years ago). As with most other geologic periods, the rock beds that define the period are well identified, but the exact start and end dates are uncertain by a few million years.