The Palaeocene began and ended with an extinction event, each of quite a different character. The epoch began with the K/T extinction event, caused by a combination of a meteorite strike (Chicxulub crater) and a huge volcanic flood basalt eruption which produced the Deccan Traps in what is now India. This caused the extinction of many groups, including the dinosaurs and many other reptiles. The epoch ended with the "Palaeocene–Eocene Thermal Maximum", a deep ocean anoxic event (DOAE). This means that the ocean depths were lacking oxygen, so no higher forms of life could survive. This produced a mass extinction of between 35–50% of deep water forms such as benthic foraminifera, and coincided with a major change of mammalian types on land.