Featured Images

Perched boulders

The crest of a linear floor fracture wall is alternately covered by boulders and smooth terrain. The largest boulders (right side of image) are ~ 30 m across. LROC NAC M159065590R, image width is 960 m [NASA/GSFC/Arizona State University].

Published on 11 Oct 2011

Farside impact!

A young, fresh impact into the farside highlands, south of Tsiolkovskiy crater. LROC NAC M159073200L, image width ~785 m [NASA/GSFC/Arizona State University].

Published on 29 Sep 2011

Follow the highlands-mare boundary in Tsiolkovskiy!

Northeastern portion of Tsiolkovskiy crater, highlighting the boundary between mare and the highlands. Asterisk notes location of NAC inset; LROC WAC monochrome mosaic, 100 m/pixel [NASA/GSFC/Arizona State University].

Published on 28 Sep 2011

Scarps in Schrödinger

A lobate scarp formed in the wall material of Schrödinger basin. LROC NAC M159099396R, image width is 1.1 km, illumination from upper right [NASA/GSFC/Arizona State University].

Published on 27 Sep 2011

Ray of boulders

Dozens of boulders, ranging from 10 m to more than 30 m in diameter, are distributed within an ejecta ray close to the crater rim (lower right). These boulders represent the deepest material excavated during crater formation. LROC NAC...

Published on 18 Aug 2011

Sampling Schrödinger

Boulders rolled down an incline on a terrace near the Schrödinger basin rim. Boulders are ~20 to 30 m in size. Image width is ~1.2 km, downslope direction to upper left, LROC NAC M159017963R [NASA/GSFC/Arizona State University].

Published on 17 Aug 2011

Lunar overhang?

Outcrop in the south wall of this unnamed rille may form an overhang. Image width 400 m across, LROC NAC M124790534R [NASA/GSFC/Arizona State University].

Published on 16 Aug 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

Stress and pull

Cracks - not boulders! - abound on the ridge crest of this wrinkle ridge in Mare Imbrium. LROC NAC M102171046LR, image width is 1.7 km [NASA/GSFC/Arizona State University].

Published on 13 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

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

Slumping rim of Darwin C

High incidence angle (83°) accentuates the slumping rim of Darwin C. The parallel fractures along the crater rim are slump blocks pulling away from the rim toward the interior of the crater, which is in shadow (lower right). LROC NAC...

Published on 28 Apr 2011

Another small volcano?

Along the embayed Eddington crater rim is an ~1.5 km dome that may be an ancient volcano with a summit pit crater. LROC NAC M148618400R, image width is 960 m [NASA/GSFC/Arizona State University].

Published on 27 Apr 2011

Forked wrinkle ridge

A wrinkle ridge in Oceanus Procellarum forks into two segments. Similar to many other wrinkle ridges, boulders are clustered on the ridge crest. LROC NAC M148536523L, image width is 720 m [NASA/GSFC/Arizona State University].

Published on 26 Apr 2011

Boulder clusters on a ridge crest

Boulders ~1 - 6 m in diameter cluster on a wrinkle ridge crest in Oceanus Procellarum. Image is 600 m across, LROC NAC M148536582R [NASA/GSFC/Arizona State University].

Published on 24 Mar 2011

Scouring secondary ejecta

Ejecta scours deep grooves into the walls and rim of an unnamed crater, located northwest of Henry Frères crater. Image width is 600 m, illumination is from the left, LROC NAC M148563335L [NASA/GSFC/Arizona State University].

Published on 23 Mar 2011

Small crater in Oceanus Procellarum

This unnamed 740 m diameter crater has bouldery walls and is morphologically similar to many <1 km diameter craters in the mare. Image width is 847 m, LROC NAC M127328861L [NASA/GSFC/Arizona State University].

Published on 22 Mar 2011

Farside northern highlands

Rugged highland terrain on the farside of the Moon, south of Cantor crater. Image width is ~3.4 km [NASA/GSFC/Arizona State University].

Published on 15 Feb 2011