PALEONTOLOGY OF THE BLAAUWATER 67 AND 65 FARMS, SOUTH AFRICA: TESTING THE DAPTOCEPHALUS/LYSTROSAURUS BIOZONE BOUNDARY IN A STRATIGRAPHIC FRAMEWORK

摘要: Abstract: Vertebrate paleontologists have proposed a model for the terrestrial end-Permian event in Karoo Basin, South Africa. The scenario envisions vegetational collapse that resulted phased extinction of vertebrate taxa uppermost Daptocephalus Assemblage Zone and overlying Lystrosaurus Zone. These biodiversity patterns are placed into composite stratigraphic sections at key localities, several which close spatial proximity. We present framework two these Old Lootsberg Pass Tweefontein, physically correlated over ∼ 2 km distance new previously reported fossils placed. Glossopterid-dominated megafloras occur both biozones, along with palynological assemblages. Katbergia, burrow used by others as an indicator transition post-transition interval, occurs paleosols much lower upper Zone, various subhorizontal cylindrical...