laurasia การใช้

• The northern continents remained together as a land mass called Laurasia.
• The collision of Gondwana and Laurasia occurred in the late Palaeozoic.
• It attached to Laurasia completely around 280 mya during the Late Permian
• It was later accreted to the continental margin of Laurasia.
• Laurasia was created near the end of the Silurian Period.
• Both placentals and marsupials are mostly known from Laurasia during the Cretaceous.
• During the Jurassic Period ( 150 ), Cimmeria finally collided with Laurasia.
• This genus and related genera at the time lived on the supercontinent Laurasia.
• Supercontinent Laurasia had not yet separated into three continents.
• In the Cretaceous, Laurasia split into the continents of North America and Eurasia.
• The region was once on the southern coast of the ancient supercontinent of Laurasia.
• The rodent fossil record dates back to the Paleocene on the supercontinent of Laurasia.
• Later, they separated into Gondwana and Laurasia.
• The Carboniferous was a time of active South China continents were still separated from Laurasia.
• This margin existed until Laurasia and Gondwana collided in the Waco Austin San Antonio trend.
• Fossil taxa are known from throughout Laurasia.
• Proto-Laurasia and Proto-Gondwana were separated by the Proto-Tethys Ocean.
• The clockwise motion of Laurasia led much later to the closing of the Tethys Ocean.
• The Litopterna occupied ecological roles as browsers and grazers similar to horses and camels in Laurasia.
• The predominant theory suggests that rodents first evolved in Laurasia, and expanded outward from there.