Featured Images

Wrinkled Reiner Gamma

LROC NAC color shaded relief (centered at 301.240°E, 7.416°N) showing part of a wrinkle ridge crosscutting the Reiner Gamma formation. Color represents elevation; derived from NAC DTM "REINER4" [NASA/GSFC/Arizona State University].

Published on 17 Sep 2013

Revealed Surface

Southern slope of unnamed fracture along the eastern mare/highland boundary of Mare Insularum. LROC NAC M1114199297R. Image center is 13.135°N, 355.638°E, image width is 1147.2 m. Downslope is toward upper-right, north is to the top...

Published on 13 Jun 2013

Wrinkle Ridge vs. Impact Crater

An impact crater modified by a wrinkle ridge. NAC M1114391184R, image width is 3.2 km [NASA/GSFC/Arizona State University].

Published on 06 Mar 2013

Wrinkle Ridge in Mare Crisium

A complex wrinkle ridge in Mare Crisium at low Sun (illumination is from the right). Boulders occupy the tops of mounds on the west ridge, and the central depression is more heavily cratered than the ridge. LROC NAC M146573730RE, image...

Published on 13 Feb 2013

Boulder Fields

Boulders of various sizes (a few meters up to ~20 meters across) scattered across the lunar surface. From where do the boulders originate? NAC M170605553LR, image width 510 m [NASA/GSFC/Arizona State University].

Published on 30 Jan 2013

Really Wrinkled

A wrinkle ridge in Mare Frigoris deformed the mare. NAC M185963754R, image width is ~1.75 km [NASA/GSFC/Arizona State University].

Published on 15 Jan 2013

Boulders In The Sea Of Serenity

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].

Published on 09 Jan 2013

Up and Down / Back and Forth

Compression and extension in Mare Tranquillitatis. A northeast-trending wrinkle ridge has overridden a northwest-trending graben. LROC NAC image M192774961L [NASA/GSFC/Arizona State University].

Published on 03 Jan 2013

Sinuous Ridges on the Slope

Triple junctions of wrinkle ridges at the western edge of Bolyai crater floor. Image width is 1270 m, LROC NAC image M134368363L. Sunlight is from left side [NASA/GSFC/Arizona State University].

Published on 02 Aug 2012

Simpelius Scarp

A lobate scarp formed in the lunar highlands. Lunar scientists keep finding more of these tectonic features as LROC NAC image coverage of the lunar surface continues to increase. LROC NAC M106807247L, image width is 1000 m...

Published on 12 Jul 2012

River of Rock

A small section of an enormous, now frozen, river of impact melt that flowed down the southeastern flank of Tycho crater some 108 million years ago. NAC image M185940195RE [NASA/GSFC/Arizona State University].

Published on 20 Jun 2012

A Wrinkly Crater

An unnamed crater deformed by tectonic forces. LROC NAC M183760209L, image width is 960 m [NASA/GSFC/Arizona State University].

Published on 08 Jun 2012

Not Your Average Scarp

A scarp winds through a region of mare. NAC M166223945L, image width is 700 m [NASA/GSFC/Arizona State University].

Published on 29 Mar 2012

Shield Volcanoes in Lacus Veris!

Wrinkle-ridges in mare basalts? Nope! These step-like features are located on the flanks of a shield volcano! Down-slope to the lower right, LROC NAC image M166406436R, image width is 728 m [NASA/GSFC/Arizona State University].

Published on 02 Feb 2012

Bulging Wrinkle

"Bulging" wrinkles extend from the north edge of Mare Tsiolkovskiy. Sunlight is from right side, image width is 610 meters, NAC M161475783L [NASA/GSFC/Arizona State University].

Published on 11 Jan 2012

Extensional Fractures

Narrow fractures extend across the lunar surface. LROC NAC frame M168007062L, image width is 550 meters [NASA/GSFC/Arizona State University].

Published on 26 Oct 2011

Posidonius Y

A boulder perched on the rim of a Copernican crater in Mare Serenitatis. NAC frame number M168041107L, image width is 250 meters [NASA/GSFC/Arizona State University].

Published on 25 Oct 2011

Tectonics in Mare Frigoris

A mare wrinkle ridge transitions to a highland lobate scarp in Mare Frigoris. Illumination is from the lower-left in this 2.9 km wide mosaic of LROC NAC images M107069913L and M107069913R [NASA/GSFC/Arizona State University].

Published on 12 Oct 2011

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

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