The People That Time Forgot (1977)

“A sequel to The Land That Time Forgot. Major Ben McBride organises a mission to the Antarctic wastes to search for his friend (Doug McClure) who has been missing in the region for several years. McBride’s party find themselves in a world populated by primitive warriors and terrifying prehistoric creatures, all of whom they must evade in order to get back safely to their ship.” — IMDb.com