{ "title": "Layers and Fractures in Ophir Chasma", "authors": "HiRISE", "metadata": { "thumbnailURL": "https://static.uahirise.org/anews/2021-04-09/ESP_042360_1755.jpg", "excerpt": "Ophir Chasma forms the northern portion of Valles Marineris, and this image features a small part of its wall and floor." }, "version": "1.5", "identifier": "ESP_042360_1755", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#faf7f2" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: 9 April 2021" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "Layers and Fractures in Ophir Chasma" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "Images like this can help geologists study the formation mechanisms of large tectonic systems like Valles Marineris. Less than 1 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2021-04-09/ESP_042360_1755.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


Ophir Chasma forms the northern portion of Valles Marineris, and this image features a small part of its wall and floor.

The wall rock shows many sedimentary layers and the floor is covered with wind-blown ridges, which are intermediate in size between sand ripples and sand dunes. Rocks protruding on the floor could be volcanic intrusions of once-molten magma that have pushed aside the surrounding sedimentary layers and “froze” in place. Images like this can help geologists study the formation mechanisms of large tectonic systems like Valles Marineris.

The word “tectonics” does not mean the same thing as “plate tectonics.” Tectonics simply refers to large stresses and strains in a planet’s crust. Plate tectonics is the main type of tectonics that Earth has; Mars does not have plate tectonics.

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ID: ESP_042360_1755
date: 10 August 2015
altitude: 269 km (167 mi)

NASA/JPL/UArizona

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