sentences:  Africa separated from Antarctica around 160 million years ago, followed by the Indian subcontinent, in the early Cretaceous (about 125 million years ago).About 66 million years ago, Antarctica (then connected to Australia) still had a tropical to subtropical climate, complete with marsupial fauna and an extensive temperate rainforest.The Lake Vostok basin is a small () tectonic feature within the overall setting of a several-hundred-kilometer-wide continental collision zone between the Gamburtsev Mountain Range, a subglacial mountain range and the Dome C region.