Map of bedrock topography

引用方式:

Soller D. R., Garrity C. P. (2018). Map of bedrock topography, sheet 2 in Quaternary sediment thickness and bedrock topography of the glaciated United States east of the Rocky Mountains: U.S. Geological Survey Scientific Investigations Map 3392, 2 sheets, scale 1: 5,000,000. https://doi.org/10.3133/sim3392.