Material fluxes associated with fluid expulsion at cold seeps and their contribution to oceanographic budgets have not been accurately constrained. Here we present evidence that the barium released at cold seeps along the San Clemente Fault zone may significantly impact the geochemical budget of barium within the basin. Barium fluxes at seep localities on the fault scarp, measured with benthic ...

The Sawtooth Fault in central Idaho, USA, is a range-bounding normal fault with Late Pleistocene–Holocene scarp near the up-valley ends of several range-front lakes. Cores from Redfish Lake, which spans fault, exhibit evidence catastrophic sediment re-mobilization two sequences consisting variably intraclastic mud-clast conglomerate, massive homogenite, and graded silt clay. Event strata younge...

Introduction: Large basaltic volcanoes, such as Olympus Mons on Mars, and the Hawaiian volcanoes on Earth, are thought to be subject to large scale slope failure and flank collapse, which scatter landslide and avalanche debris (a.k.a., aureole deposits) about the base of the edifice [1], [2], [3], [4], [5]. Volcano growth may also be accompanied by gravitational relaxation of the edifice, refer...

First posted May 16, 2023 For additional information, contact: Earthquake Science CenterU.S. Geological Survey345 Middlefield Road Mail Stop 977 Menlo Park, CA 94025 The Wallula Fault Zone is composed of a series northwest-trending faults and folds that coincide with prominent magnetic anomaly extends uninterrupted for approximately 120 kilometers within the Cascadia back arc southeastern Washi...

Due to challenges involved in mapping the seafloor at high-resolution (e.g., <2 m), data are lacking understand processes that control evolution of submarine normal fault scarps, which cover large parts global seafloor. Here, we use from autonomous deep-sea vehicles quantify local erosion and deposition associated with a pronounced tectonic surface scarp formed by slip on Roseau (Lesser Antille...

The Sencelles Fault constitutes the main extensional structure of Mallorca Island (Spain), holds a NE-SE orientation, and has been identified as possible seismic source 1851 CE Palma earthquake (VII EMS.) SE termination fault (Sta. Eugenia Segment) features linear bedrock scarp maximum 3.15 m height. last 840 this rocky display significant horizontal banding, with up to five differentially weat...

Surface topography results from complex couplings and feedbacks between tectonics surface processes. We combine analog numerical modeling, sharing similar geometry boundary conditions, to assess the topographic evolution of an alluvial fan crossed by active thrust fault. This joint approach allows calibration critical parameters constraining river deposition–incision laws, such as settling velo...

Dating of submarine volcanic systems is key to understand the history tectonic and interactions within Lesser Antilles arc. In this study, we investigate radioisotopic dating located between Les Saintes (Guadeloupe) Dominica islands in an intra-arc graben bounded west by active Roseau fault. Submarine lava flows domes have been sampled with remotely operated vehicle (ROV) Victor6000 controlled ...