Three-dimensional investigation of geomorphic environments using ground penetrating radar

Ground penetrating radar datasets were collected from a variety of sites to provide three-dimensional (3D) images of coastal and eolian geomorphic environments. The images will aid in better understanding tectonically active coastlines and the internal geometry of eolian sandstones. An ancient eolian dune complex, consisting of two bedset packages with distinct truncation surfaces, was imaged at Zion National Park, Utah. The 200 MHz 3D dataset shows the internal stratigraphy with southwest dipping reflections ranging from 13 to 20 degrees. A second dataset was collected along the coastline in the southwest portion of Washington State. This 225 MHz dataset reveals the 3D structure of an erosional scarp caused by earthquake activity in the area. Results from the surveys indicate that the imaging in 3D is an effective means of analyzing internal stratigraphy of geomorphic features by allowing the user to more easily interpret spatial relationships within a dataset.