Jurassic links
The same dinosaurs turn up on both shores of the Atlantic. Run the plates back and the ocean between them closes.
The sites are measured: 260 Late Jurassic fossil sites in the Paleobiology Database, linked when they share a genus. Where they sat 152 million years ago is a model, PALEOMAP run through GPlates, and plate models disagree by about 1,000 km. On that map the 1,066 links that now cross an ocean are 30 percent shorter. The coastlines are today's, carried back with their plates.
Fossil sites: Paleobiology Database (CC BY 4.0). Plates: PALEOMAP via the GPlates Web Service.