Craig N. Jarchow, Stanford University Coherent Noise Recorded on Limestone: Observations and Models In many areas of the world, the nature Joe Stefani, Chevron USA of the local geology hinders reflection Study of the Feasibility of Using Mode-Coverted Waves to Image beneath Surface seismic exploration. Examples of such High-Velocity Layers Guy W. Purnell, Texaco E&P Technology Div. geologies are volcanic rock layers, karst Case Study in a Shallow Water Carbonate topography, permafrost layers, multipleproducing Area hard water bottoms, and anything Paul Krail, Texaco E&P Technology Div. that creates strong back-scattered energy. Rocks discuss data acquisition problems caused Brian N. Fuller, University of Wyoming by some of these geologies. Emphasis will be on practical field techniques, with data examples showing what does and does not work in each type of area. The workshop will include time for extended discussions among audience participants and the invited speakers.