Logging Report
Black Rock Forest
Cornwall, NY
July 13-17 and September 7, 1999

July 13-17, 1999
The Lamont Doherty Earth Observatory's Borehole Research Group logged one hole at the Black Rock Forest in Cornwall, NY. The equipment was brought to the site via West Central Towing and dropped at the site. In attendance were Greg Myers, Dave Goldberg, Walt Masterson and Erich Scholz. The tool suite consisted of:

1. TAP – The temperature acceleration and pressure tool is designed to measure fluid temperature and pressure and store the data in memory.
2. Analog BHTV (Borehole Televiewer) – The BHTV captures acoustic images of the borehole wall and writes the images onto Polaroid film. The film is digitized post logging for data analysis.

September 7, 1999
1. Gamma and Caliper data were acquired to total depth (140 m).
2. The gamma/caliper sonde consists of:

Data Processing and Quality Control

Gamma data are to be used for qualitative analysis only as the measurement has not been calibrated in a certified facility. To ensure the data were reasonable prior to tool deployment, a small calibration source was used to simulate a slightly active formation. The data represent the total gamma counts at each depth interval in counts per second (cps). The depth index column was added post logging. No corrections are applied to these data.

Caliper data are calibrated with 3-calibration rings prior to deployment. The caliper data is recorded in inches and converted to centimeters. No other corrections are applied to these data.

Temperature and Pressure
Temperature and pressure data were acquired at 1 sample per second. The units for temperature and pressure are degrees C and psi, respectively. No corrections are applied to these data.

Borehole Research Group
Lamont-Doherty Earth Observatory
Palisades, NY 10964