TY - RPRT TI - Preliminary geologic framework developed for a proposed environmental monitoring study of a deep, unconventional Marcellus Shale drill site, Washington County, Pennsylvania AU - Robert G. Stamm PY - 2018 DO - 10.3133/ofr20181057 UR - https://pubs.usgs.gov/publication/ofr20181057 ID - ofr20181057 ER -