Featured Images
Layering in Messier A
Avalanches festoon the layered walls of Messier A crater (2.2°S, 46.9°E). NAC image number M126622485R, incidence angle 25°, Sun is from the east, north is up, image is ~625 meters across [NASA/GSFC/Arizona State University].
Published on 19 Jul 2011
Splash and flow
Impact melt flowed across the primary ejecta of an unnamed Copernican-aged impact crater (46.75°N, 49.81°E). LROC NAC M159631206L,R; source crater toward the bottom [NASA/GSFC/Arizona State University].
Published on 14 Jul 2011
Relative age relationships
A wrinkle ridge cross-cuts and deforms an impact crater in northeast Mare Imbrium. Deformed impact crater is ~330 m in diameter, LROC NAC M104540211RE, image width is 1.7 km [NASA/GSFC/Arizona State University].
Published on 12 Jul 2011
Tycho Central Peak Spectacular!
Oblique view of summit area of Tycho crater central peak. The boulder in the background is 120 meters wide, and the image is about 1200 meters wide. LROC NAC M162350671L,R [NASA/GSFC/Arizona State University].
Published on 29 Jun 2011
Zebra Stripes
Boulders decorate the slopes of this wrinkle ridge in southern Oceanus Procellarum. Image number M135507772R, incidence angle 56°, image scale is 0.5 m/pixel [NASA/GSFC/Arizona State University].
Published on 29 Jun 2011
Old Man River (of Lava)
A tight turn in a sinuous rille. Could you drive a SUV sized rover through it? Probably, it's flat on the bottom. Just watch out for house-sized boulders. Image number M157934151L, incidence angle 35°, image is 1.75 km across...
Published on 28 Jun 2011
Ghost Crater in Southern Mare Crisium!
Crest of a wrinkle ridge in Mare Crisium lined with boulders that have most likely weathered out of the summit. LROC NAC M150138095LE, image width is 500 m [NASA/GSFC/Arizona State University].
Published on 23 Jun 2011
Das crater
An impact melt pool (lower right) within Das crater. Nearby boulders are the result of fractured impact melt, which have migrated downslope and formed talus (upper left). Uphill direction is to the top left. LROC NAC M136091866, image...
Published on 22 Jun 2011
Jenner Crater: Mare Flooded Floor
A nascent 15 km wrinkle ridge in Jenner crater. Wrinkle ridges help lunar scientists understand the stresses affecting a region. LROC NAC M115693540LE, image width is 1350 m [NASA/GSFC/Arizona State University].
Published on 21 Jun 2011
Chaotic crater floor in Tycho
The floor of Tycho crater is covered in many places by a chaotic surface of impact melt forms. Image scale is 0.5 m/pixel, image width is 500m. Incidence angle 84°, sunlight is from left side [NASA/GSFC/Arizona State University].
Published on 15 Jun 2011
Polygonal fractures on Tycho ejecta deposits
Polygonal fractures on a flow lobe of impact melt splashed out of Tycho crater. Image scale is 0.52 meters/pixel, incidence angle is 69.1°, sunlight is from left [NASA/GSFC/Arizona State University].
Published on 14 Jun 2011
Frozen in Time
Boulder migration is arrested by a gentle change in slope (20.14°N, 310.03°E). NAC image number M137875459R; incidence angle 36°; sun is from the southwest; north is up; image is ~460 meters across [NASA/GSFC/Arizona State University]
Published on 09 Jun 2011
Rubble Pile on Fresh Crater Floor
Appearing highly textured, a mixture of boulders, cobbles, and fine material partly fills a relatively fresh impact crater (12.7°S, 291.2°E). NAC image number M112047758R; incidence angle 35°; sun is from the east; north is up; image is...
Published on 08 Jun 2011
Dark-haloed crater in Mare Humorum
Dark- and light-toned lunar soils contrast sharply in this striking image of a dark-haloed crater in Mare Humorum (24.8°S, 45.0°W). NAC image number M140203430R; incidence angle 24°; Sun is from the north; north is up; image is ~450...
Published on 07 Jun 2011
Dry debris or liquid flow?
A granular debris flow on the wall of Stevinus A (downhill to the right). A 7 m diameter boulder impedes the progress of the flow, which bifurcates and reconnects about 10 m downhill. LROC NAC M154893929R, image is 500 m across...
Published on 02 Jun 2011
Look at that flow!
Spectacular rubbley impact melt, flowing away from its parent crater. Across the widest part of the terminal lobe, the flow is ~115 m. LROC NAC image M153863408R, image is 500 m across [NASA/GSFC/Arizona State University].
Published on 01 Jun 2011
Impact melt in Anaxagoras crater
Boulders clustered on a positive relief bulge in an impact melt deposit on the floor of Anaxagoras crater (73.5°N, 349.7°E); most of the boulders are 10 - 30 m across. LROC NAC M155309869R, image width is 910 m [NASA/GSFC/Arizona State...
Published on 31 May 2011
Fractured Impact Melt
Cracks in impact melt inside Thales crater. The smooth impact melt is fractured and then sprinkled with boulders from the neighboring slope. LROC NAC M157270357R, image scale is 0.53 meters/pixel, incidence angle is 62°...
Published on 26 May 2011
Granular Flow
A dry flow of boulders down the slope of Riccioli CA's inner wall. Slope direction is from the bottom right hand corner to the upper left hand corner. LROC NAC M112074670R, image scale is 0.5 meters/pixel, incidence angle is...
Published on 25 May 2011
Crater in Mare Humorum
This crater, located in Mare Humorum, is relatively fresh and very bouldered. LROC NAC M157851844LE, image width is 500 m [NASA/GSFC/Arizona State University].
Published on 24 May 2011