Laurussia (also Euramerica EUR or America) is in the earth's the name of a continent that had been created during the Silurian by the collision of Laurentia and Baltica / Avalonia and to the Upper Carboniferous had an independent development. In other publications can be found for this geological continent, the term Euramerica. The frequently used in older publications term Old- Red- continent is also a synonym for Laurussia. The term is defined but very inaccurate and referred basically a regional geologic unit that is characterized by the presence of the Old Red Sandstone.
The name Laurussia as the name of the super continent of Laurentia and Baltica formed first appears in a publication of a group of authors to Alfred M. Ziegler, published in the series Milwaukee Public Museum Special Publications in Biology and Geology 1977. In almost simultaneously published in the journal Tectonophysics work of another, again led by Alfred M. Ziegler author of the group name Euramerica for this geological continent has been introduced. Both names are used approximately equal frequency in the sequence. Today, the designation Laurussia has largely prevailed.
Laurussia as a separate continent of the Earth's
At the beginning of the Cambrian period about 540 million years ago, there were four major land masses or continents Laurentia, Baltica, Gondwana and Sibiria, and certainly a number of small crustal blocks. In the Silurian Baltica and Laurentia collided with the closure of the intervening Iapetus Ocean - to Laurussia. In the Upper Carboniferous ( about 310 million years ago ) was united under closure of Rheischen Ocean Laurussia with Gondwana. After the Permian was accreted to Laurussia still Sibiria, the supercontinent Pangaea had formed, which extended from the North Pole to the South Pole.