Methods for Analyzing High Resolution 3D Digital Outcrop Geology: Deepwater Jackfork Sandstone at Big Rock Quarry, Arkansas

Qualitative facies distributions and quantitative bed/channel dimensions in three-dimensional virtual outcrops using ground-based remote sensing and analysis of terrain surfaces is a basis for geologic mapping and interpretation of deepwater deposits at Big Rock Quarry, Arkansas located in the southeastern part of the Ouachita Mountains in North Little Rock, Arkansas (Fig 1). Three-dimensional views of the lower part of the upper Jackfork Group (Olariu et al, 2008) allows three-dimensional reconstruction of facies architectural elements, stacked channels that lack levees and overflow deposits, a submarine channel complex deposited at the base of slope estimated as 9.6 km by 16 to 24 km pinching out 4 km north of the quarry. Flow indicators are oriented west-southwest.