You've discovered a new site in southern kenya, that you think might be about 1 ma. you look around for a bit and recover fossils of deinotherium boszai, giraffa stillei, parmularius altidens, beatragus antiquus, eurygnathohippus sp., and kolpochoerus heseloni. what's the best approximate age for the site?

The safest guess before making examination would be somewhere between 2 and 2.5 million years ago. Considering when all of this species roamed the African continent this is an a very safe age to guess, because all of the species were existent in the this frame of time and represented with solid amount of individuals.