The Cainozoic history of the Malanna area included faulting, deposition of sediments by streams or in lakes and swamps, two epochs of planation, and stream erosion. There is no physiographic, depositional or structural evidence for gladation in this area, the type area of Lewis's Malanna Phase of the Pleistocene glaciation. This phase must be considered invalid on the eviaence available in the ...

A novel approach to the automatic detection of fault surface images in 3D seismic datasets is presented. Based on the premise that seismic faulting introduces discontinuities into the rock layering (that is, the horizons), a coherency measure is used to detect points of significant horizon discontinuity. A highest confidence first (HCF) merging strategy is then combined with a flexible surface ...

Appreciable injection-induced seismicity has been occurring in northcentral Oklahoma since 2009. To better understand these earthquakes, we have compiled new information on the state of stress in the state to compare it with both mapped faults and faults inferred from earthquake epicenters and focal plane mechanisms. Seventy-five new in situ stress orientations are available from wellbores thro...

Linear elastic boundary element models are commonly used tools to understand the mechanics of earthquake cycle processes and their contribution growth tectonic structures. Here we describe a two-dimensional plane strain linear approach based on displacement discontinuity method. This integrates an analytic solution for coincident interactions using three node quadratic elements classic particul...

Introduction: An understanding of the sources of stress, and the expected style, orientation, and magnitudes of stress and associated strain is important for understanding the evolution of faulting on Mars and its relationship to loading, thus leading to an improved understanding of Martian geologic history and surface morphology. The Tharsis province, characterized by radial graben sets and ci...