Lexic.us

Definition of Pennsylvanian period

1. Noun. From 310 million to 280 million years ago; warm climate; swampy land.

Lexicographical Neighbors of Pennsylvanian Period

Literary usage of Pennsylvanian period

Below you will find example usage of this term as found in modern and/or classical literature:

1. Agricultural Geology by Frederick Valentine Emerson (1920)
"During most of the pennsylvanian period, the land in eastern North America was low and marshy and the conditions were favorable for coal formation. ..."

2. Elements of Geology by Eliot Blackwelder, Harlan Harland Barrows (1911)
"... pennsylvanian period THE system which contains the most important deposits of coal in both the United States and Europe is called in America the ..."

3. Starved Rock State Park and Its Environs by Carl Ortwin Sauer, Gilbert Haven Cady, Henry Chandler Cowles (1918)
"During the rest of the pennsylvanian period, after the material of No. ... With the close of the pennsylvanian period the marine record of the region was ..."

4. Geology by Thomas Chrowder Chamberlin, Rollin D. Salisbury (1905)
"... the north to California on the south.1 For this region the volcanic activity subsided before the close of the pennsylvanian period. CLOSE OF THE PERIOD. ..."

5. Geology by Thomas Chrowder Chamberlin, Rollin D. Salisbury (1905)
"... the north to California on the south.1 For this region the volcanic activity subsided before the close of the pennsylvanian period. CLOSE OF THE PERIOD. ..."

6. A College Text-book of Geology by Thomas Chrowder Chamberlin, Rollin D. Salisbury (1909)
"In southern Brazil the system contains much coal.2 THE LIFE OF THE PENNSYLVANIAN PERIOD I. THE PLANT LIFE With the opening of the Carboniferous period the ..."

7. Geology by Thomas Chrowder Chamberlin, Rollin D. Salisbury (1907)
"... the close of the pennsylvanian period. CLOSE OF THE PERIOD. Geographic changes which contracted the eastern ulterior sea to very narrow limits (Fig. ..."

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