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195 million years ago
What's going on here?
The breakup of Pangaea is just beginning. Rift zones, new divergent plate boundaries, are beginning to open up. The 'gaps' fill with narrow seas that will one day grow to form the Gulf of Mexico and the Atlantic Ocean.
A subduction zone grows along most of the length of what will become North and South America. Volcanic arcs build along most of the western edge of Pangaea.
Reconstructing ancient Earth
These remarkable figures are produced by C.R. Scotese and
the PALEOMAP project. Geologists
call these illustrations paleogeographic reconstructions,
because they illustrate the reconstructed geography of our Earth
at some time in the past.
Making a paleogeographic reconstruction begins by examining
several lines of evidence including: paleomagnetism, magnetic anomalies, paleobiogeography, paleoclimatology,
and geologic history. By combining all available evidence,
geologists are able to construct paleogeographic maps, such
as these, that interpret
how the geography might have appeared at a specific location
and time in the past. Paleogeographic maps are continually
being refined as more
evidence is collected.
To find out more about how paleogeographic reconstructions
are made visit the PALEOMAP project site.
Move forward or back in time.
| 650 |
Time in millions of years. Jump back to visit any time!
Scotese, C. R., 1997. Paleogeographic Atlas, PALEOMAP Progress Report 90-0497, Department of Geology, University of Texas at Arlington, Arlington, Texas, 37 pp.
| Into Earth | | Putting
the pieces toge ther | | Action
at the edges |
| National Parks by Tectonic Regions
| Earth through time | | Detailed
version: This Dynamic Earth |