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Understanding growth-faulted, intraslope subbasins by applying sequence-stratigraphic principles: Examples from the south Texas Oligocene Frio Formation: Reply

¹ Bureau of Economic Geology, John A. and Katherine G. Jackson School of Geosciences, University of Texas at Austin, University Station, Box X, Austin, Texas 78713-8924; frank.brown@beg.utexas.edu
² Bureau of Economic Geology, John A. and Katherine G. Jackson School of Geosciences, University of Texas at Austin, University Station, Box X, Austin, Texas 78713-8924; bob.loucks@beg.utexas.edu
³ Bureau of Economic Geology, John A. and Katherine G. Jackson School of Geosciences, University of Texas at Austin, University Station, Box X, Austin, Texas 78713-8924
⁴ Bureau of Economic Geology, John A. and Katherine G. Jackson School of Geosciences, University of Texas at Austin, University Station, Box X, Austin, Texas 78713-8924

The first 20% of the full text of this article appears below.

GENERAL REPLY TO DISCUSSION

We appreciate the time and effort expended by Edwards in preparing his discussion of our article (Brown et al., 2004b). We published our observations on the interaction of the development of growth-faulted subbasins and sediment fill because of the successes that we have had in integrating wire-line-log analysis, large volumes of three-dimensional (3-D) seismic data, paleontological data, and modern concepts of stratigraphy and sedimentology into a coherent model. We shared this model to stimulate future research on development of growth-faulted subbasins and their sediment fill. We believe that most geoscientists recognize the common method of developing stratigraphic architecture by integrating wire-line-log data with 3-D seismic data.

We do not agree with Edwards (2006) that the art of wire-line-log correlation is disappearing within the industry because of the advent of seismic data. Our in-depth interaction with industry leads us to believe that the ability to correlate wire-line logs has advanced greatly because of supporting seismic data. Anyone who has completed a project using a robust data set of wire-line logs and 3-D seismic data will attest to the fact that the 3-D seismic data guided the wire-line-log correlations and showed the pitfalls of older correlating methods. The integration of wire-line-log and seismic data is necessary to develop the structure and stratigraphic architecture in complex growth-faulted basins. Edwards acknowledged that he uncommonly has seismic data available, and this may be a reason why he does not promote the integration of wire-line-log and 3-D seismic data.

We recognize that anyone can correlate a series of wire-line logs, but is it just assumed pattern recognition, or are the correlations based on scientific principles? Wire-line-log correlations should be conducted on pattern recognition only in chronostratigraphically equivalent packages such as the lowstand section of a single, growth-faulted subbasin or in the onshelf transgressive and . . . [Full Text of this Article]