The majority of circles investigated in western Russia were built from mammoths.
But archaeologists have also found bones from reindeer, bears, horses, wolves, red foxes and arctic foxes in the mix.
The bones were assembled into a structure about 30ft by 30ft (9.1m by 9.1m) and were scattered across the interior.
Researchers from Exeter have been studying one of these structures near the village of Kostenki, about 311 miles (500km) south of Moscow.
Dr Alexander Pryor, who led the study, said: “Kostenki 11 represents a rare example of Palaeolithic hunter-gatherers living on in this harsh environment.