Mount Rushmore, a 5 00-million-year old Harney Peak Batholith of the Black Hills, South Dakota, in 1923 pic.twitter.com/IxHt8eqc23
— History_of_Geology (@Geology_History) July 4, 2020
via Twitter https://twitter.com/Geology_History
July 05, 2020 at 01:55AM
No comments:
Post a Comment