{ "title": "HiPOD", "metadata": { "thumbnailURL": "bundle://header.jpg", "excerpt": "Athabasca Valles is a late Amazonian-period outflow channel in the central Elysium Planitia region of Mars, located to the south of the Elysium Rise." }, "version": "1.5", "identifier": "ESP_028519_1895", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#faf7f2" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: WEDNESDAY, 30 OCTOBER 2019" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "Streamlined in Athabasca Valles" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "A black and white image showing a streamlined feature. The flows you see are likely the remnants of an ancient lava flow. (NASA/JPL/University of Arizona)", "URL": "bundle://ESP_028519_1895-main.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "
This image completes a mosaic of images covering a collection of streamlined islands in Athabasca Valles. Streamlined islands form by a rapid erosive flow (catastrophic flooding) around an obstacle such as a resistant rock outcrop or surface armored by impact ejecta.
Examination of the margins of the islands can show evidence of terraces as in this image. Each terrace may indicate a different flow event or flood level, and can be used to reconstruct the history of flood events.
NASA/JPL/University of Arizona
ID: ESP_028519_1895
date: 25 August 2012
altitude: 277 km