Complex sentence: One portion of evidence that helps with this idea is the deposits that were found that date from 15,000 cal B.P. that are fairly newer that the other burials, which suggest that these bodies were brought to be buried in this area.
Split into simpler sentences: One portion of evidence that supports this idea is the deposits that were found date from 15,000 cal B.P. and are fairly newer than the other burials. This suggests that these bodies were brought to be buried in this area.