@misc{https://doi.org/10.5066/f7wh2n65,
doi = {10.5066/F7WH2N65},
url = {https://www.sciencebase.gov/catalog/item/5888bf4fe4b05ccb964bab9d},
author = {Horton,
John D},
title = {The State Geologic Map Compilation (SGMC) Geodatabase of the Conterminous United States},
publisher = {U.S. Geological Survey},
year = {2017} }