{ "title": "HiPOD", "metadata": { "thumbnailURL": "bundle://header.jpg", "excerpt": "Olivine is a rock-forming mineral that weathers quite easily in the presence of water." }, "version": "1.5", "identifier": "testArticle", "language": "en", "layout": { "columns": 10, "width": 1024, "margin": 85, "gutter": 20 }, "documentStyle": { "backgroundColor": "#F5F9FB" }, "components": [ { "role": "heading1", "layout": "heading1Layout", "text": "HiPOD: TUESDAY, 8 OCTOBER 2019" }, { "role": "divider", "layout": "bigDividerLayout", "stroke": { "width": 3, "color": "#8c2028" } }, { "role": "title", "layout": "halfMarginBelowLayout", "text": "On the Presence of Olivine" }, { "role": "photo", "layout": "fullBleedLayout", "caption": "Ridges on the wall of a mound that are likely composed of the mineral olivine.", "URL": "bundle://ESP_055211_1510-main.jpg" }, { "role": "caption", "layout": "halfMarginBothLayout", "text": "Less than 5 km across, 255 km above the surface. (NASA/JPL/University of Arizona)" }, { "role": "body", "format": "html", "layout": "hipodMarginLayout", "text": "
Olivine rock is usually harder than surrounding rock and stands out as distinct ridges, which is likely what we see in part of this observation of a large mound in Tyrhenna Terra. Olivine is a rock-forming mineral that is a primary component of the Earth’s own mantle. Since olivine weathers easily by water, its abundance on Mars might indicate that the planet has been cold and dry for a very long period of time.
Tyrrhena Terra is typical of the southern Martian region, with heavily cratered highlands and other rugged terrain. It contains the large volcano Tyrrhena Patera, one of the oldest volcanoes on Mars.
ID: ESP_055211_1510