File:Alba Fossae (PIA26194).jpg
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Alba Fossae is a set of long valleys on the western side of Alba Mons. These valleys are referred to as graben and are formed by extension of the crust and faulting.
Summary
editDescriptionAlba Fossae (PIA26194).jpg |
English: Alba Fossae is a set of long valleys on the western side of Alba Mons. These valleys are referred to as graben and are formed by extension of the crust and faulting. When large amounts of pressure or tension are applied to rocks on timescales that are fast enough that the rock cannot respond by deforming, the rock breaks along faults. In the case of a graben, two parallel faults are formed by extension of the crust and the rock in between the faults drops downward into the space created by the extension. Numerous sets of graben are visible in this THEMIS image, trending from north-northeast to south-southwest. Because the faults defining the graben are formed perpendicular to the direction of the applied stress, we know that extensional forces were pulling the crust apart in the west-northwest/east-southeast direction. The large number of graben around Alba Mons is generally believed to be the result of extensional forces associated with the uplift of Alba Mons. Orbit Number: 94834 Latitude: 45.2143 Longitude: 248.077 Instrument: VIS Captured: 2023-05-01 23:10 https://photojournal.jpl.nasa.gov/catalog/PIA26194 |
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Date | Taken on 2 November 2023 | ||
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Author | NASA Jet Propulsion Laboratory / NASA/JPL-Caltech/ASU |
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) | ![]() |
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