Pangaea Breakup
Pangaea’s rifts began developing into new ocean basins around 200 million years ago. By 175 million years ago, breakup was already underway: new oceanic crust formed between separating continents as the Atlantic widened.
Pangaea’s rifts began developing into new ocean basins around 200 million years ago. By 175 million years ago, breakup was already underway: new oceanic crust formed between separating continents as the Atlantic widened.

Annual surface temperature from CESM (T): a model estimate, not a direct observation of the past.
0 Ma: pre-industrial climate/CO₂; modern sea-level and O₂ references.
Glacial-interglacial cycles with 120m+ sea level swings. Homo sapiens spread from Africa across the globe, and most megafauna went extinct.
Annual model means · 0 Ma: pre-industrial
Mapped sample / window records · not abundance
0–2.5 Ma
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API records whose numeric ages miss the queried window are excluded from the map and counts, with exclusions retained in provenance.
Plate boundaries are a separate model comparison. Their reference frame differs from PALEOMAP terrain and coordinates; coastlines may not align.
· 0 Ma
Data & licenses ↗Present