{ "title": "Meanders in Ridge Form in the Zephyria Region ", "authors": "HiRISE", "metadata": { "thumbnailURL": "https://static.uahirise.org/anews/2021-04-22/ESP_024695_1745.jpg", "excerpt": "In this image, an ancient sinuous meandering river system is surrounded by features called “yardangs.”" }, "version": "1.5", "identifier": "ESP_024695_1745", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#faf7f2" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: 22 April 2021" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "Meanders in Ridge Form in the Zephyria Region" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "The raised relief of the meandering river suggests inverted topography, likely due to lithification and cementation of the riverbed sediment. Less than 1 km across. (NASA/JPL/UArizona)", "URL": "https://static.uahirise.org/anews/2021-04-22/ESP_024695_1745.jpg" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "


In this image, an ancient sinuous meandering river system is surrounded by features called “yardangs.” The yardangs are the ridge-like landforms that align approximately north-south. These features were created as the wind scoured and eroded the bedrock.

The raised relief of the meandering river suggests inverted topography, likely due to lithification and cementation of the riverbed sediment. The cemented channel deposits were resistant, and thus less susceptible to erosion over time. However, the area surrounding the riverbed suggests that this area was a floodplain of weaker lithology that was subsequently eroded and shaped to the yardangs.

The main meandering inverted riverbed within the image has a length of about 13 kilometers. The elevation of the channel at the top of the image is on the order of 113 meters higher than the bottom, based on Mars Orbiter Laser Altimeter (MOLA) data. This elevation difference and the increase in sinuosity of the channel shape in the southerly direction implies that the flow of the ancient river may have been heading south-southwest.

" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "

ID: ESP_024695_1745
date: 2 November 2011
altitude: 268 km (167 mi)

NASA/JPL/UArizona

" }, { "role": "caption", "format": "html", "layout": "halfMarginBothLayout", "text": "Enhanced color image is less than 1 km across. For full images with scalebars, see the above ID link to our website.

" } ], "textStyles": {}, "componentLayouts": { "noMarginLayout": { "columnStart": 0, "columnSpan": 7 }, "niceMarginLayout": { "columnStart": 0, "columnSpan": 10 }, "hipodMarginLayout": { "columnStart": 0, "columnSpan": 9 }, "heading1Layout": { "columnStart": 0, "columnSpan": 7, "margin": { "top": 24, "bottom": 3 } }, "halfMarginBelowLayout": { "columnStart": 0, "columnSpan": 10, "margin": { "bottom": 12 } }, "fullMarginBelowLayout": { "columnStart": 0, "columnSpan": 7, "margin": { "bottom": 24 } }, "fullMarginAboveHalfBelowLayout": { "columnStart": 0, "columnSpan": 7, "margin": { "top": 24, "bottom": 12 } }, "bigDividerLayout": { "ignoreDocumentMargin": "right", "columnStart": 0, "columnSpan": 10, "margin": { "top": 6, "bottom": 6 } }, "fullBleedLayout": { "ignoreDocumentMargin": true }, "halfMarginBothLayout": { "columnStart": 0, "columnSpan": 8, "margin": { "top": 12, "bottom": 12 } }, "fullMarginAboveLayout": { "columnStart": 0, "columnSpan": 7, "margin": { "top": 24 } }, "halfMarginAboveQuarterBelowLayout": { "columnStart": 0, "columnSpan": 7, "margin": { "top": 12, "bottom": 6 } } }, "componentStyles": {}, "componentTextStyles": { "default": { "fontName": "DINAlternate-Bold", "textColor": "#222222", "fontSize": 16, "lineHeight": 22, "linkStyle": { "textColor": "#D5B327" } }, "default-body": { "fontName": "MiloSerifOT-Text", "fontSize": 20, "lineHeight": 30, "paragraphSpacingBefore": 12, "paragraphSpacingAfter": 12, "linkStyle": { "textColor": "#378DBD" } }, "default-title": { "fontName": "MiloSerifOT-Text", "fontSize": 44, "tracking": 0, "lineHeight": 48, "textColor": "#2e5284" }, "default-intro": { "fontName": "DINAlternate-Bold", "fontSize": 18, "lineHeight": 22, "textColor": "#A6AAA9" }, "default-byline": { "fontName": "DINAlternate-Bold", "fontSize": 15, "lineHeight": 18, "textColor": "#53585F" }, "default-heading2": { "fontName": "DINAlternate-Bold", "tracking": 0.05, "textColor": "#53585F" }, "default-heading1": { "fontName": "MiloOT-Light", "tracking": 0.12, "textColor": "#53585F" }, "bodyFirstDropCap": { "dropCapStyle": { "fontName": "DINAlternate-Bold", "textColor": "#A6AAA9", "numberOfLines": 2 } }, "default-heading2": { "fontName": "IowanOldStyle-Roman", "fontSize": 48, "lineHeight": 44, "textColor": "#53585F" }, "default-caption": { "fontName": "MiloSerifOT-Text", "fontSize": 14, "lineHeight": 18, "paragraphSpacingBefore": 12, "paragraphSpacingAfter": 12, "textColor": "#53585F" }, "default-pullquote": { "fontName": "DINAlternate-Bold", "fontSize": 30, "lineHeight": 36, "textColor": "#A6AAA9", "hangingPunctuation": true }, "attribution": { "fontName": "DINAlternate-Bold", "fontSize": 12, "lineHeight": 16, "tracking": 0.12, "textColor": "#53585F", "textAlignment": "right" } } }