This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Quarterly journal of the Geological Society of London . BELT ON THE STEPPES OF SIBERIA that west of the meridian of Samarova the blocks lie exposed on the surface whilst eastward they are completely covered by the great deposit of clay two thousand miles to the eastward of this point at Yakutsk he states that the strata