Images Featured Sites Quickmap Videos Gigapan Exhibits Exciting New Images from The LROC Team. Total posts from Volcanism 81 Search Smooth floor in Copernicus crater With the exception of recent impacts (such as this one) into the floor material of Copernicus, much of the northwestern floor of Copernicus appears smooth and relatively featureless (upper right corner). This region on the crater floor appears similar to mare basalt flows, but studies show that volcanism has not shaped the landscape of Copernicus' interior. Instead, it is possible that a vast volume of impact melt was created during impact and cooled differentially across the crater floor such that some areas appear smooth while others are hummocky. LROC NAC M135317661L, image width is 520 m [NASA/GSFC/Arizona State University]. Published on 29 Sep 2010 Volcanoes in Lacus Mortis Most of the craters on the Moon formed through impact processes. However, some craters, like the one visible in this portion of LROC NAC frame M131488521R, may be a volcano summit pit crater. Crater diameter is ~400 m, the image width is 923 m, and illumination is from the right [NASA/GSFC/Arizona State University]. Published on 10 Aug 2010 A Dark Cascade at Sulpicius Gallus LROC NAC close-up of the wall of a suspected volcanic vent within the regional pyroclastic deposit near Sulpicius Gallus. Image M124505982R, view is 517 m across [NASA/GSFC/Arizona State University]. Published on 22 Jul 2010 Marius Hills Constellation region of interest Rim of a large sinuous rille on the western edge of the Marius Hills Constellation region of interest, showing materials that have slumped into the bottom of the sinuous rille towards the northwest as well as (possibly) outcrop, a prime location for fieldwork and sample collection. One of the several hundred volcanic features located in the Marius region. Exploration of this site will yield important insights into planetary volcanism. Image width is 550 m [NASA/GSFC/Arizona State University]. Published on 01 Jun 2010 Craters on the Schrodinger pyroclastic cone LROC NAC closeup clustered craters on the Schrodinger pyroclastic cone, one of the NASA Constellation regions of interest. Although likely relatively young, the craters in this cluster have a subdued appearance because they formed in the loose pyroclastic material. NAC Frame M108313384R, view is 785 m across [NASA/GSFC/Arizona State University]. Published on 22 Apr 2010 Hortensius Domes - Constellation Region of Interest Summit crater of Hortensius Dome Phi. Summit craters of all the Hortensius Domes show no raised rims and are not circular, indicating they are not impact craters, rather that they are analogous to volcanic calderas. Image width 1.22 km, NAC image M104691278R [NASA/GSFC/Arizona State University]. Published on 01 Apr 2010 Apollo Basin: Mare in a Sea of Highlands High resolution LROC image of floor of the Apollo Basin, a large (538 km diameter) double-ringed impact crater in the southern hemisphere of the far side. This image shows part of the boundary between two flow units within the volcanic mare deposits on the crater's floor. The sharp boundary between the topographically higher lavas on the right side of the image and the lower ones on the left reveals layers, suggesting that multiple volcanic events were involved in forming some of the isolated volcanic plateaus seen within the otherwise uniform crater floor lava flows. Both the high and low materials here are heavily covered in impact craters, indicating that these lavas, like much of the Moon's surface, are ancient. Many boulders can also be seen shedding out of the upper layers and eroding down onto the lower deposits. Image is 880 meters wide, and north is up. Part of NAC frame M114953774LE [NASA/GSFC/Arizona State University]. Published on 30 Mar 2010 Two-toned Impact Crater in Balmer Basin: A Reflection of the Target? Materials excavated during formation of this ~450 m diameter impact crater have an unusual two-toned character, likely a reflection of heterogeneity in the target materials. This crater occurs in Balmer Basin, an area thought to harbor a type of 'cryptomare' - an old volcanic surface covered by later light-toned impact deposits. The dark materials may be basaltic rock excavated from deeper parts of the crater. The crater is located at 18.341°S latitude and 69.950°E longitude. The scene is 540 m across, a subset of NAC M111138159LE [NASA/GSFC/Arizona State University]. Published on 26 Mar 2010 Marius Hills Pit - Lava Tube Skylight? The Marius Hills pit is a possible skylight in a lava tube in an ancient volcanic region of the Moon called the Marius Hills. This LROC image is the highest resolution image of the pit to date. Image width is 1400 meters, NAC M114328462R [NASA/GSFC/Arizona State University]. Published on 01 Mar 2010 Riccioli Crater: Cracked, Melted, and Draped High-resolution LROC view of part of the floor of Riccioli Crater, near the center of the Constellation region of interest. The view is centered on the boundary between a spur of the crater's central peak materials (lower right half of the image) and volcanic lava flow deposits (upper left half). The central peak materials are rougher and show a faint pattern of lines running NE-SW, suggesting that this terrain, like much of the rest of the crater, was scoured by ejecta from the younger Orientale impact basin to the southwest. Part of NAC frame M114444141LE, image width is 500 m and north is up [NASA/GSFC/Arizona State University]. Published on 04 Feb 2010 Prev 1 … 5 6 7 8 9 Next ← Previous Next → Displaying Post 71 - 80 of 81 in total