Digital 3D database of faulted horizons in the northern Arkoma basin, Arkansas

This is a digital dataset to accompany the journal article "Influence of inherited structure on flexural extension in foreland basin systems: Evidence from the northern Arkoma basin and southern Ozark dome, USA", published in April 2024 by Earth Science Reviews. This dataset contains point features, line features, and raster grids that together constitute a 3D structural model of the northern Arkoma basin and southern Ozark dome in Arkansas, USA. Point and line features represent the 3D structural of faults. Raster grids represent 1) the tops of several key, unconformity-bounded stratal packages, and 2) the interpolated mean vertical separation of these tops across the faults. The raster grids representing formation tops offset by faults were originally created using a kriging method within the Petroleum Experts MOVE software, then conditioned and modified using the Seequent Leapfrog software and ESRI ArcPro. The formation tops are constrained by several thousand subsurface oil and gas wells in the study area.

This database contains the following:

Raster Grids representing the tops of several formations within the Arkoma Basin, which were constructed intially in 3D MOVE using the surfaces with boundaries tool, but were then conditioned in Leapfrog GEO and ArcPro.
Shapefiles and gdb. feature class lines representing the 1:500k faults and 1:500k fault cutoff lines that comprise the model.
Shapefiles and gbd. feature class points representing the 3D structure of faults used in the model.
Non-spatial tables describing the database.

Variations in the elevation of the raster grids reflect the subsurface structural architecture of the study area. Lutz et al. (2024) showed that along-strike variations in vertical separation were strongly influenced by pre-existing structure within the crystalline basement (e.g., preexisting faults, intrusive rock bodies). The 3D model also demonstrates variations in the thicknesses of syn-orogenic units, which support a southeast to northwest migration of flexural loading, foreland basin subsidence, and sedimentation. This product is meant to serve as a 3D geologic framework model in subsequent topical (e.g., the nature of faulting in the basin) and applied studies (e.g., groundwater resource modeling). The spatial reference for this data is NAD 1983 Contiguous USA Albers (EPSG 5070), and distance is measured in meters (m).