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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>Boulders In The Sea Of Serenity</h1> </header> <article class="mb-5"> <p><figure class="img-polaroid"><img alt="" src="/news/uploads/LROCiotw/M106826896_thumb_copy.png"><figcaption>A wrinkle ridge in western Mare Serenitatis is littered with boulders and high-albedo (bright) areas. Image is ~1.5 km across, NAC M106826896L [NASA/GSFC/Arizona State University].</figcaption></figure></p> <p><p>A <a href="/posts/58">wrinkle ridge</a> in western Mare Serenitatis (23.448掳N, 8.058掳E) is one of many in the region that exhibits a high boulder density and high albedo (bright) summit areas. But it isn't the only place this relationship is seen! These bouldered ridges are also observed in <a href="/posts/320">Oceanus Procellarum</a>, Mare Humorum, Mare Cognitum, and Mare Nubium, to name a few. Scientists are still uncertain as to why some ridges have these features and others don't, and why this isn't observed along the entire ridge. This ridge seems to be eroding along its slope, rather than the crest, suggesting that the material is coming from the ridge itself. In addition, a small impact crater (red arrow in below image) has excavated boulders and high albedo material, making it more likely that the source is from the ridge and not a product of distant cratering events. </p> <div class="img-polaroid"> <div class="serendipity_imageComment_img"><a onclick="F1 = window.open('/news/uploads/LROCiotw/M106826896LE_crater_unsharp_ann.png','Zoom','height=1515,width=1515,top=-210,left=210,toolbar=no,menubar=no,location=no,resize=1,resizable=1,scrollbars=yes'); return false;" href="/news/uploads/LROCiotw/M106826896LE_crater_unsharp_ann.png" class="serendipity_image_link"><img src="/news/uploads/LROCiotw/M106826896LE_crater_unsharp_ann.png" class="serendipity_image_center" /></a></div> <div class="serendipity_imageComment_txt">Larger view showing a crater (red arrow) that has excavated the same material that is eroding out of the ridge. Image is ~2.3 km across, NAC M106826896L [NASA/GSFC/Arizona State University].</div> </div> <p>There are two ways to describe high albedo on the Moon: either freshly exposed rock and soil, or material with different composition or properties. It is uncertain which description is best for the high albedo observed along these ridges or whether it is a combination of the two. If the boulders and high albedo material have happened because of tectonic activity, then that implies that activity along mare wrinkle ridges has occurred more recently than previously thought. These features need to be studied in more detail in order to fully understand what role they play in lunar history. This is just one of the many surprises that LROC has revealed!</p> <div class="img-polaroid"> <div class="serendipity_imageComment_img"><a class="serendipity_image_link" href="/news/uploads/LROCiotw/M106826896_Context_ann.png" onclick="F1 = window.open('/news/uploads/LROCiotw/M106826896_Context_ann.png','Zoom','height=1615,width=1615,top=-260,left=160,toolbar=no,menubar=no,location=no,resize=1,resizable=1,scrollbars=yes'); return false;"><img class="serendipity_image_center" src="/news/uploads/LROCiotw/M106826896_Context_ann.png" /></a></div> <div class="serendipity_imageComment_txt">WAC monochrome mosaic at 100 m/pixel. Here, the location of the wrinkle ridge in Mare Serenitatis (red arrow) is shown in relation to the Apollo 15 landing site (yellow star) [NASA/GSFC/Arizona State University].</div> </div> <p>To view the ridge in more detail, look at the top of the full LROC NAC frame!</p>  <p><iframe class="olZoomify" data-fi-zoomify="{"ptifName":"M106826896","width":8845,"height":52393,"leftX":"885","rightX":"7961","topY":"5239","bottomY":"47154"}" src="/zoomify?image=M106826896&left_x=885&right_x=7961&top_y=5239&bottom_y=47154"style="width: 100%; height: 700px;"></iframe></p> <p>Related Posts: <br /><a href="/posts/320">Bright ridge near Mons Hansteen</a><br /> <a href="/posts/163">Constellation Region of Interest in Mare Tranquillitatis</a><br /> <a href="/posts/302">Buckland Boulders</a><br /> <a href="/posts/44">Wrinkle Ridge Near Montes Teneriffe</a></p> <p> </p></p> <div class="text-center p-2 mx-5"> <p>Published by <a href="/images?author_id=58">Renee French</a> on <span class="text-nowrap"> 9 January 2013</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> <a class="card-link d-flex gap-2 align-items-center" href="/image_tags/Albedo"> <span>Albedo</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/632"> <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/632"> <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/632"> <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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