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https://www.usgs.gov/media/images/flynn-creek-drill-core-67-01-box-15-fc67-1box015
Flynn Creek Drill Core 67-01: Box 15 (FC67-1_Box_015) | U.S. Geological Survey
Between 1967 and 1979, USGS scientist Dr. David Roddy conducted a drilling program at Flynn Creek crater. The drilling program produced more than 3.8 km of...
https://www.nrc.gov/docs/ML0201/ML020100291.html
NRC: Package ML020100291 -Hope Creek Generating Station - Issuance of Amendment Re: Core Spray...
https://www.usgs.gov/media/images/original-core-log-entry-flynn-creek-drill-hole-number-1
Original core log entry for Flynn Creek drill hole number 1. | U.S. Geological Survey
Original core log entry for Flynn Creek drill hole number 1.