What had been a vast grassland became the shallow seafloor of the Bering Strait.

The specific people and animals that had lived in the submerged portions of Beringia left no accessible record in the traditional archaeological sense.

But on the elevated margins of Beringia — on the parts of the Seward Peninsula that remained above water as the sea rose — some record of the ancient Beringian world survived.

The Trail Creek Caves were part of that elevated margin.

The Danish Expedition of 1949