Blog Post Image: Scientists Cast Doubt on Theory of What Triggered Antarctic Glaciation

Reconstruction of the Scotia Sea area 25 million years ago, showing volcanoes of the ancestral South Sandwich arc (ASSA). They are now submerged, but were active at that time and possibly emergent. They may have blocked the onset of the Antarctic Circumpolar Current. (NSR = North Scotia Ridge; SSR = South Scotia Ridge; SG = South Georgia island). Image credit: The University of Texas at Austin (Click image to enlarge)