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(i)

EURAMERICA (also known as LAURUSSIA (not to be confused with Laurasia ), the OLD RED CONTINENT or the OLD RED SANDSTONE CONTINENT) was a minor supercontinent created in the Devonian
Devonian
as the result of a collision between the Laurentian , Baltica
Baltica
, and Avalonia
Avalonia
cratons ( Caledonian orogeny
Caledonian orogeny
), 433 million years ago. In the Late Carboniferous
Carboniferous
, tropical rainforests lay over the equator of Euramerica. A major, abrupt change in vegetation occurred when the climate aridified. The forest fragmented and the lycopsids which dominated these wetlands thinned out, being replaced by opportunistic ferns. There was also a great loss of amphibian diversity and simultaneously the drier climate spurred the diversification of reptiles.

CONTENTS

* 1 Extent * 2 Events by period * 3 See also * 4 References * 5 External links

EXTENT

Euramerica
Euramerica
in the Devonian
Devonian

Euramerica
Euramerica
became a part of the major supercontinent Pangaea
Pangaea
in the Permian
Permian
. In the Jurassic
Jurassic
, when Pangaea
Pangaea
rifted into two continents , Gondwana
Gondwana
and Laurasia
Laurasia
, Euramerica
Euramerica
was a part of Laurasia.

In the Cretaceous
Cretaceous
, Laurasia
Laurasia
split into the continents of North America and Eurasia
Eurasia
. The Laurentian craton became a part of North America while Baltica
Baltica
became a part of Eurasia
Eurasia
, and Avalonia
Avalonia
was split between the two.

EVENTS BY PERIOD

* Carboniferous: Climate change devastated tropical rainforests, fragmenting the forests into isolated 'islands' and causing the extinction of many plant and animal species during the Carboniferous Rainforest Collapse (CRC). * Permian: Euramerica
Euramerica
became a part of the supercontinent Pangaea. * Jurassic
Jurassic
: Pangaea
Pangaea
rifted into Gondwana
Gondwana
and Laurasia
Laurasia
. * Cretaceous: Laurasia
Laurasia
split into the continents of North America and Eurasia
Eurasia
.

SEE ALSO

* Continental drift * Eurasia
Eurasia
* Main Uralian Fault

REFERENCES

* ^ Sahney, Sarda; Benton, Michael J.; Falcon-Lang, Howard J. (2010). "Rainforest collapse triggered Pennsylvanian tetrapod diversification in Euramerica" (PDF). Geology. 38 (12): 1079–1082. doi :10.1130/G31182.1 .

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