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en.wikipedia.org/wiki/Carboniferous

The Carboniferous is a geologic period and system that spans 60 million years from the end of .... The Carboniferous was a time of active mountain-building, as the supercontinent Pangaea came together. The southern continents remained tied ...

www.ucmp.berkeley.edu/carboniferous/carboniferous.php

The Carboniferous Period is famous for its vast swamp forests, such as the one ... major biological, geological, and climatic events occurred during this time.

www.nationalgeographic.com/science/prehistoric-world/carboniferous

Learn about Earth's Carboniferous period and prehistoric life.

www.britannica.com/science/Carboniferous-Period

Fifth interval of the Paleozoic Era, succeeding the Devonian Period and preceding the Permian Period. In terms of absolute time, the Carboniferous Period ...

www.thoughtco.com/carboniferous-period-129666

Nov 13, 2015 ... The Carboniferous Period is named after the rich coal deposits that are present in rock layers from this time period.

www.fossils-facts-and-finds.com/carboniferous_period.html

The Carboniferous Period of the Paleozoic Era began 354 million years ago. It lasted for about ... More of the land was exposed to the air at this time. Both plants  ...

www.bbc.com/nature/history_of_the_earth/Carboniferous

A carboniferous forest during the Carboniferous period with club mosses, ferns and ... Fossil trees tell of a time when Britain was covered in tropical rainforest.

www.encyclopedia.com/earth-and-environment/geology-and-oceanography/geology-and-oceanography/carboniferous-period

Carboniferous period (kärbənĬf´ərəs), fifth period of the Paleozoic era of geologic time (see Geologic Timescale, table), from 350 to 290 million years ago.

palaeos.com/paleozoic/carboniferous/carboniferous.htm

An intro to the Carboniferous Period, includes a review of each of the geological sub-divisions and the various forms of life that lived during this time.

quatr.us/geology/eras/carboniferous.htm

A third mountain chain rose up in the Rocky Mountains at this time, but it's ... The end of the Carboniferous period was about 290 million years ago, when the ...