Timeline & Stratigraphy
251.9 Ma
Karoo Formations Log
Beaufort Group
Synthetic Core Drill (Facies Log)
Synchronized Proxy Curves & Extinction Horizons (300 – 180 Ma)
Dynamic Pulse Model Active
δ13C Carb (‰)
MAP Precip (mm/yr)
Paleotemp (°C)
Legacy Linear Dry
Extinction Event
Horizon Diagnostics
P-Tr Boundary
δ13C Excursion
-6.4 ‰
Mean Precip (MAP)
1,480 mm
Paleo-Temperature
28.4 °C
Faunal Turnover
88 %
Dominant Tetrapod Biozone
Lystrosaurus Assemblage Zone
Boundary Scenario Presets
Volcanic CO₂ Forcing Simulator
P-Tr Crisis (251.9 Ma): Massive Siberian Traps degassing triggered extreme hyperthermal shocks in Gondwana. The Karoo basin records catastrophic floral collapse (Glossopteris extinction), transition from meandering to braided ephemeral rivers, and dramatic isotope excursions.