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flex-shrink-0" role="main"> <div class="px-0 px-sm-3 col-lg-10 mx-auto text-start"> <header> <h1>Constellation Region of Interest at Mare Tranquillitatis</h1> </header> <article class="mb-5"> <p><figure class="img-polaroid"><img alt="" src="/news/uploads/LROCiotw/M104376385_thumb.png"><figcaption>Close up of a northwest trending wrinkle ridge in the high-Ti basaltic lava plains of Mare Tranquillitatis, near a Constellation region of interest. The bright areas along the steepest parts of the ridge are places where less mature subsurface materials have been exposed by small impacts or fracturing of the bedrock as the original mare surface buckled. Image is 1.25 km wide [NASA/GSFC/Arizona State University].</figcaption></figure></p> <p><p>The Constellation region of interest in Mare Tranquillitatis is a good example of a site that combines operational benefits with fascinating geologic features. An equatorial nearside location where landings would be fairly straightforward, the most obvious feature that draws your eyes in this region of interest is the dramatic wrinkle ridge that dominates the landscape. Wrinkle ridges like these are common on lunar mare surfaces and have long been a subject of interest to lunar scientists. </p> <p> </p> <div class="img-polaroid"> <div class="serendipity_imageComment_img"><a class="serendipity_image_link" href="/news/uploads/LROCiotw/WAC_crop_context.png"><img alt="" class="serendipity_image_center" src="/news/uploads/LROCiotw/WAC_crop_context.png" /></a></div> <div align="justify" class="serendipity_imageComment_txt">Long wrinkle ridges in Mare Tranquillitatis in LRO Wide Angle Camera (WAC) image M117345275M [NASA/GSFC/Arizona State University]. The section of wrinkle ridge shown in the featured NAC image is in the center of this WAC view. Arago crater (lower left), is 26 km in diameter.</div> </div> <p> </p> <p> </p> <p>Lunar wrinkle ridges can be hundreds of kilometers long, tens of kilometers wide, and hundreds of meters high. Read more in <a href="http://ser.sese.asu.edu/GHM/">Wilhelms, 1987</a>! They can have a sinuous or linear appearance with asymmetric cross-sections. In other words, the feature that you see could easily be made up of a smaller ridge superposed on a broad rise.<br /> <br /> Lunar wrinkle ridges are found in the mare basalt deposits that filled the giant impact basins on the Moon. Frequently, wrinkle ridges are oriented concentric to large impact basins. Loading of the basin floor with multiple eruptions of mare basalts causes the formation of wrinkle ridges in the basin center and graben along the mare margins (see figure below). The tremendous weight of the newer basalt layers then causes the center of the basin to sag. As the basin center sags, the basalts slide towards the basin center causing compression that results in folding and faulting of the basalt. The sagging of the basin under the weight of the basalt also causes the opening of graben along the edges of the basalt layers.</p> <p> </p> <div align="justify" class="img-polaroid"><a class="serendipity_image_link" href="/news/uploads/LROCiotw/WR_model.png"><img alt="" class="serendipity_image_center" src="/news/uploads/LROCiotw/WR_model.png" /></a><br /> Idealized cross-section through an impact basin that filled with three episodes of mare basalt eruptions [Hiesinger, 1999, PhD dissertation]. Loading of the basin floor with mare basalts causes the formation of wrinkle ridges in the basin center and graben along the mare margins.</div> <p><span style="font-size: 1.1em;">We also know, thanks to the samples collected by the Apollo 11 astronauts, that the mare basalts in this region are rich in titanium. Study of the Apollo samples has shown that it is relatively straightforward to extract resources (especially oxygen) from titanium-rich lunar soils. Using local resources will increase the capability and reduce the cost of future lunar exploration.</span></p> <p><i>For more information on LROC's observation campaign for the Constellation Program regions of interest read <a href="http://ser.sese.asu.edu/LSM/files/LPSC_40_jolliff_LROC_targeting_final_final.pdf" title="Jolliff LPSC 40 abstract.">this Lunar and Planetary Science Conference abstract</a>, and visit the <a href="http://ser.sese.asu.edu/LSM/" title="LRO Targeting Meeting">LRO Science Targeting Meeting</a> website (look for the baseball card summary sheets for each site: <a href="http://ser.sese.asu.edu/LSM/files/Cx-LROC-Tier1-FINAL.pdf" title="Regions of Interest, Tier 1">part 1</a>, <a href="http://ser.sese.asu.edu/LSM/files/Cx-LROC-Tier2-FINAL.pdf" title="Regions of Interest, Tier 2">part 2</a>).</i></p> <p>Explore the wrinkle ridges in Mare Tranquillitatis! Or browse other Featured Images containing wrinkle ridges near <a href="/posts/44">Montes Teneriff</a> and <a href="/posts/58">northwest of Mare Imbrium</a>.</p>  <p><iframe class="olZoomify" data-fi-zoomify="{"ptifName":"M104376385L","width":5064,"height":52224,"leftX":"506","rightX":"4558","topY":"5222","bottomY":"47002"}" src="/zoomify?image=M104376385L&left_x=506&right_x=4558&top_y=5222&bottom_y=47002"style="width: 100%; height: 700px;"></iframe></p> </p> <div class="text-center p-2 mx-5"> <p>Published by <a href="/images?author_id=56">Mike Zanetti</a> on <span class="text-nowrap">27 April 2010</span></p> </div> <hr class="my-5 hr-paragraph"> <div class="row row-cols-1 row-cols-sm-2 px-3 px-md-0"> <div class="col tags py-2 px-0 px-md-3 align-self-center text-start d-flex gap-1"> <a class="card-link d-flex gap-2 align-items-center" href="/image_tags/Wrinkle%20Ridge"> <span>Wrinkle Ridge</span><i class="fas fa-tag text-primary"></i> </a> <a class="card-link d-flex gap-2 align-items-center" href="/image_tags/Mare"> <span>Mare</span><i class="fas fa-tag text-primary"></i> </a> </div> <div class="col social px-0 px-md-3 align-self-center text-start text-sm-end d-flex justify-content-end"> <a target="_blank" class="card-link d-inline-flex gap-2 align-items-center" href="//www.facebook.com/sharer/sharer.php?u=http://lroc.sese.asu.edu/images/163"> <i class="fab fa-facebook"></i> </a> <a target="_blank" class="card-link d-inline-flex gap-2 align-items-center" href="//twitter.com/intent/tweet?url=http://lroc.sese.asu.edu/images/163"> <i class="fab fa-twitter"></i> </a> <a target="_blank" class="card-link d-inline-flex gap-2 align-items-center" href="//www.reddit.com/submit?url=http://lroc.sese.asu.edu/images/163"> <i class="fab fa-reddit"></i> </a> </div> </div> </article> </div> </main> <footer class="footer mt-auto"> <div class="container"> <div class="row"> <div class="col-md-4 pb-5 py-md-2"> <span class="footer-brand mb-2"><img class="footer-img" src="/assets/LROC_patch_alpha-bcddde05a14e141c980aa2f2525ba78b826a15843a289bf9fa543709e488e018.png" />LROC</span> <p> Lunar Reconnaissance Orbiter Camera<br> Science Operations Center<br> Phoenix, Arizona </p> </div> <div class="col-md-4 pb-5 py-md-2"> <h4>Moon friends</h4> <a target="_blank" class="d-block" href="https://moon.nasa.gov/">NASA Moon</a> <a target="_blank" class="d-block" href="https://lunar.gsfc.nasa.gov/">Lunar Reconnaissance Orbiter</a> <a target="_blank" class="d-block" href="https://www.shadowcam.asu.edu/">ShadowCam</a> <a target="_blank" class="d-block" href="https://www.intuitivemachines.com/">Intuitive Machines</a> <a target="_blank" class="d-block" href="https://sese.asu.edu/">ASU School of Earth and Space Exploration</a> <a target="_blank" class="d-block" href="https://ser.sese.asu.edu/">Space Exploration Resources</a> <a target="_blank" class="d-block" href="https://apollo.sese.asu.edu/">Apollo Image Archive</a> <a target="_blank" class="d-block" href="https://tothemoon.ser.asu.edu">March to the Moon Image Archive</a> </div> <div class="col-md-4 pb-5 py-md-2"> <h4>Connect with us</h4> <a class="d-block" target="_blank" href="https://sese.asu.edu/community-engagement/events">ASU School of Earth and Space Exploration</a> <a class="d-block" href="/visit/exhibits">LROC Lunar Exhibits</a> <a class="d-block" href="/news_tags/Events">LROC Affiliated Events</a> <a class="d-block" href="/contact">Contact Us</a> </div> </div> <hr class="mx-3 mx-md-0 my-5"> <div class="row"> <p class="col pt-3 pt-md-0 text-gray-dark">©2025 NASA/GSFC/LROC. 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