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A structure contour map on top of the Precambrian was prepared by the author as part of a report on the statewide distribution of natural CO2 gases in the subsurface (Broadhead et al., 2009). An understanding of the structure of the Precambrian and the structural relief on top of the Precambrian is necessary to understanding the locations and boundaries of basins and uplifts in the state. Many of the uplifts and basins are largely buried beneath strata that post-date the structural formation of the basins. Distribution and structure of basins and uplifts controls the distribution and thickness of stratigraphic units and is also integral to understanding the distributions and trends of major tectonic elements in the state. It also controls depth to mineralization in Precambrian rocks. |