Looking for the title of an old sci-fi movie. 60s, maybe 70s. I believe it was in black and white.
Group of people/scientest travel underground in a sort of drilling machine. Pop up in some underground lake, where there are dinosaurs. One of these dinosaurs takes the vehicle someplace, and they have to go get it and stop the dinosaur to escape. I remember one scene where the African Guide gets stepped on by the dinosaur and all that is left is his necklace.
I tried all the "journy to the center of the earth", "Land of the lost" searched. But those dont seem to fit the bill. Let me know.