Relative dating of the pennsylvanian period
Deeper troughs ( During the Carboniferous Period, the climate of various landmasses was controlled by their latitudinal position.
Since prevailing wind patterns were similar to those on Earth today, tropical conditions characterized the equatorial regions; the midlatitudes were dry, and higher latitudes were both cooler and moist.
The distribution of land and sea followed fairly predictable limits.
Lithospheric plate movement brought the continents close together on one side of the globe.