Hypoxia and Medicine

P T ocean anoxia 1 gif

Summary: anoxia that characterized most of the ocean of 250 million years ago Oceanic anoxia at the Permian Triassic boundary about 250 million years ago Map from Wignall and Twitchett 2002 Exactly where the exact Permian Triassic boundary is in this boundary section has been the subject of ongoing dispute Yukio Isozaki who has probably studied the Japanese boundary sections

Image Dimensions: 525 x 328