Logbook entry: Recconaissance to Heroin Tower (2009-12-09) at Heroin Tower
About happenings on Dec. 9, 2009, wrote:
Reconnaissance trip to ice tower ridge. This cave was named based on the large quantity of needles. Bio samples were taken and a Tinytag was installed. Harry used the thermocouple probe to measure soil temperatures spaced out throughout the tower as well as at several depths beneath the Tinytag to give a gradient.