It appears to represent a grade of South African Permo-Triassic diapsids that are not more closely related to each other as a whole than they are to other reptiles.
42.
Based on models of sediment burial, weathering and oxidation of organic matter, scientists have been able to deduce a gradual decrease in atmospheric oxygen ratios across the Permo-Triassic boundary.
43.
The area is threaded by numerous broadly north-south aligned normal faults thought to have been active during Permo-Triassic times and perhaps later, in association with early rifting of the Atlantic Ocean.
44.
Half-graben and wedge-shaped infill geometries characterize both the Permo-Triassic and late Jurassic stretching events in the northern North Sea, most prominently in the area southwest of the Brent Field.
45.
Although there is no fossil record of reef lobsters, there is some evidence that they may be related to the extinct genus " Eryma " which lived from the Permo-Triassic to the late Cretaceous.
46.
In the Zagros and Persian Gulf Basins the highly porous Cretaceous and Tertiary carbonate rocks make very important oil reservoirs, while Permo-Triassic carbonates, particularly the Dalan and Kangan formations, are the main gas and condensate reservoirs.
47.
The cause of the Permo-Triassic extinction is unclear, and some authors have indicated that it may be best explained by a " Murder on the Orient Express Scenario " in which multiple causes contributed to a devastating impact on life.
48.
The sediment infill of the basin is of Permian to lower Jurassic age and is up to 4.5 km thick in the south-east suggesting that greater and later subsidence occurred in the basin than in any other British Permo Triassic basin.
49.
At the top of the river there is the Devonian Quartzite ( Metamorphic ), in the middle of the river there is the Permo-Triassic Marl ( Sedimentary ) and the lower part of the river consists of Jurassic Limestone ( Sedimentary ).
50.
Moreover, since the study found that " Lycideops " was not directly related to the Early Triassic " Tetracynodon darti ", it suggested that this lineage of therocephalians did not survive uninterrupted past the Permo-Triassic extinction event.
