As detailed in proxy (climate), borehole temperature measurements at a series of different depths can be effectively "inverted" (a mathematical formula to solve a matrix equation) to help estimate historic surface temperatures.
The government bore was 400 feet deep and the artesian water rose 15 feet into the air from the bore.
Borehole |
Allanridge established as a settlement in 1947 and was named after Allan Roberts whose borehole's proximity to the gold bearing reef was the precursor to the mining in the area.
The borehole Leppalúði on the way to the Gufudalur valley erupts continuously, reaching a height of 10–12 meters.
During his tenure he supervised the drilling of the Rookhope borehole discovering, as predicted by his colleague Martin Bott, the presence of a concealed granite underlying the Pennines.
The Weardale Granite pluton is the largest and the only one that has been proved (sampled), after the Rookhope Borehole confirmed Martin Bott's hypothesis that a large negative gravity anomaly under Weardale represented a low-density igneous intrusion.
•
In the early 1960s, a borehole was drilled at Rookhope by Durham University, and proved the existence of the intrusion at a depth of 390 m.
Rate of penetration, or drill rate, the speed at which a drill bit breaks the rock under it to deepen the borehole
Stoneley waves are most commonly generated during borehole sonic logging and vertical seismic profiling.