TY - RPRT TI - Preliminary report on mercury geochemistry of placer gold dredge tailings, sediments, bedrock, and waters in the Clear Creek restoration area, Shasta County, California AU - Roger P. Ashley AU - James J. Rytuba AU - Ronald Rogers AU - Boris B. Kotlyar AU - David Lawler PY - 2002 DO - 10.3133/ofr02401 UR - https://pubs.usgs.gov/publication/ofr02401 ID - ofr02401 ER -