Surf these sites: Davis-Namson Consulting Geologists -- Geologic maps, construction of balanced cross sections, seismic interpretation, subsurface mapping and trap identification, fold and thrust belt petroleum system analysis, and structural field work. GeoGraphics'' Home Page (Simon Tapper) -- Maps, drawings, diagrams, charts and figures for science and technical writers in geology, Earth and planetary science, geography and astronomy. Geologic Data Systems -- Map data in digital form, supplied at various scales for much of the world, is available in multiple Geographic Information Systems (GIS ) formats with consistent layering and attribution schemes.
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