Abstract

A field reconnaissance was carried out near Green Bank, West Virginia, to assess the possibility that active faults might produce movements which would introduce errors to geodetic results of Very Long Baseline Interferometry (VLBI) measurements carried out with radio telescopes at the National Radio Astronomy Observatory (NRAO). The 38th parallel lineament, a zone of strike-slip faults and other features, has been proposed by several authors to pass through the Green Bank area and to extend to the Blue Ridge in Virginia. This study, based on Landsat photogeologic mapping, found no evidence for the existence of the lineament in exposed Paleozoic rocks, and a seismometer emplaced at the NRAO detected no activity that could be related to the lineament. It is concluded that the 38th parallel lineament, though well-documented in the midcontinent region, does not extend this far east and that it is probably a purely intracontinental structure unrelated to oceanic fracture zones of the Atlantic.

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