GOMPHOTHERIUM PRODUCTUM. An extinct proboscide mammal, common in northwestern North America, approximately 10 million years ago. Specimen found near Hidden Timber (South Dakota), in the Rosebud Indian Reservation. Geology Museum. Rapid City State of South Dakota. U.S.
GOMPHOTHERIUM PRODUCTUM. An extinct proboscide mammal, common in northwestern North America, approximately 10 million years ago. Specimen found near Hidden Timber (South Dakota), in the Rosebud Indian Reservation. Geology Museum. Rapid City State of South Dakota. U.S.