When did pelycosaurs go extinct? Dimetrodon, an extinct relative of primitive mammals, lived fromabout 286 million to 270 million years ago, during the Permian Period, in the section of Pangea that would eventually split off to become North America. When did the first synapsids appear? The ...
When did Gondwanaland exist? According to plate tectonic evidence, Gondwana was assembled by continental collisions in the Late Precambrian (about 1 billion to 542 million years ago). Gondwana then collided with North America, Europe, and Siberia to form the supercontinent of Pangea. Is Atlantis in...
-about 200 million years ago Pangea began to split up to form the continents we know today; -homo sapiens, ie human beings, emerged between 100,000 and 200,000 years ago. It is thus not hard to understand why these discoveries have presented a challenge to those who apply a strict ...
Usually new oceans are born when continents break apart and hot magma pours into the faults, hardens and turns into the oceanic crust. This is how the Atlantic Ocean was created in the Mesozoic era when the supercontinent Pangaea split into southern Gondwana and northern Laurasia continents. Conv...