The Geological Survey of the Netherlands (GSN) systematically produces 3D stochastic geological models of the Dutch subsurface. These voxel models are regarded essential in answering subsurface-related questions on, for example, aggregate resource potential, groundwater flow, land subsidence hazard and the planning and realization of large-scale infrastructural works. GeoTOP is the most recent ...

Off-shore petroleum exploration nowadays routinely uses the marine controlled-source (MCSEM) survey, which consists of a set of sea-bottom receivers and a moving electrical bipole transmitter. We show that the MCSEM survey with its dense system of transmitters and receivers, is extremely well suited for application of the holography/migration method. The combined EM signal in the receivers form...

The Nechako NATMAP project is a joint mapping venture between the Geological Survey of Canada (GSC) and the British Columbia Geological Survey Branch (BCGSB). This was the fifth and final year of the project which encompasses more than 30 000 square kilometres in central British Columbia (Figure 1). The primary objective of the project has been to improve the quality and detail of bedrock and s...

JOSEPH J. DYER*, SHANNON K. BREWER , THOMAS A. WORTHINGTON* AND ELIZABETH A. BERGEY ‡ Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, OK, U.S.A. U.S. Geological Survey, Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, OK, U.S.A. Oklahoma Biological Survey and Department of Zoology, University of Oklahoma, N...