Modern geophysics has established that all of the Earth's landmasses were indeed joined together in one supercontinent, Pangaea, hundreds of millions of years ago, and that this supercontinent was broken apart, with the land masses drifting to their present positions on the globe.This idea took ...
英语翻译1.dinosaurs first appeared about 230 million years ago 2.the earth was very different back then-there were no mammals,there were no flowering plants,and all of the continents joined together in a giant land mass called Pangaea 3.today sci
HAVE EARTH’S CONTINENTS ALWAYS LOOKED THE SAME? The world looked very different millions of years ago, when all the continents were joined in one huge block of land, or supercontinent, which we call Pangaea. This was surrounded by a vast ocean, called Panthalassa. Over millions of years, ...
This wasbecause the land that made up Pangaea wasn't one solid land mass.It was a number of smal areas of land joined together.3) Gondwanaland spli into the land masses we know as Africa, India,South America, Antarctica and Australia. Laurasia split into the landmasses we know as North...
1.First, Wegener noted that the shorelines ofcontinentsfit together, forming a large supercontinent and that marine, nonmarine, and glacial rock sequences of Pennsylvanian to Jurassic ages are almost identical for all Gondwana continents, strongly indicating that they were joined together at one time...
It wasn't until 1912 that meteorologist Alfred Wegener hypothesized that Earth's continents had once been joined as a supercontinent that we now call Pangea. Wegener had noticed that the borders of the continent matched up and fit together, almost like a giant jigsaw puzzle, and this finding ...