{ "title": "A Crater with Gullies on a Central Structure", "authors": "HiRISE", "metadata": { "thumbnailURL": "https://static.uahirise.org/anews/2020-08-24/ESP_025082_2295.jpg", "excerpt": "Gully systems in the central structure have eroded underlying layers that are less resistant to erosion than the surface rock." }, "version": "1.5", "identifier": "ESP_025082_2295", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#faf7f2" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: 24 August 2020" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "A Crater with Gullies on a Central Structure" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "A cutout showing the gullies on the crater’s central structure. Less than 5 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2020-08-24/ESP_025082_2295.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


The 40-kilometer diameter unnamed crater in this image is located west of Lyot Crater and north of Deuteronilus Mensae in the northern plains of Mars.

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As we see in the cutout, gully systems in the central structure have eroded underlying layers that are less resistant to erosion than the surface rock. Previous channelized water flows likely transported the eroded sediments toward the southeast and deposited them forming the expansive debris aprons.

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The formation of channels on the debris aprons supports the hypothesis that these sediments were transported down the gullies and then deposited onto the aprons by flowing water. In the larger, northernmost system, sediments have partially filled in the channel segments and winds have remobilized these sediments forming the dunes that line the gullies.

" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "An enhanced color cutout showing one of the larger gullies. Less than 1 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2020-08-24/ESP_025082_2295-2.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


ID: ESP_025082_2295
date: 02 December 2011
altitude: 305 km

NASA/JPL/UArizona

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