Preliminary Note on a New Shazam Stratigraphy Applied to a Borehole Database Analysis of Subsurface Geology in the Osaka Plain

Abstract

 We propose Shazam stratigraphy as a new analytical method based on facies analysis and sequence stratigraphy. This method is applied to a recently developed borehole database and subsurface geology in the Osaka Plain. Using the method, the shapes of lithofacies boundaries in subsurface sections are optimized for sedimentary faces and changes. The optimized boundary allows interpretation of seismic sections. The result is better recognition and reconstruction of depositional systems, geomorphological evolution, and tectonics. Irregular sequence boundaries, flat transgressive ravinement surfaces, and sawtooth downlap surfaces of the prograding depositional system are key boundaries for this method.