Delicate patterns in Giordano Bruno ejecta

Far edge of the Giordano Bruno crater ejecta blanket. LROC NAC M115617436L, 0.9 m/pixel, image width is 1.08 km, Sun is from right side. Giordano Bruno is to the northwest of image [NASA/GSFC/Arizona State University].

Impact cratering is a common and universal phenomena on every planet and satellite. However, we still do not completely understand this complicated process. The Moon is one of the best libraries of impact craters in our Solar System because its surface is not modified by atmospheric weathering or water erosion. The dominant form of erosion on the Moon is indeed impact cratering.

Today's featured image shows the edge of the Giordano Bruno crater ejecta (102.91°E, 35.94°N); upper-left of the WAC image (below). Here you can easily see the delicate patterns of ejecta overlying pre-existing terrain. The ejecta pattern points back to the crater, and gives the impression of a fast moving surface flow. Combining the morphology of the ejecta, and new topographic data from NAC stereo pairs, scientists will be better equipped to unravel the physics of ejecta emplacement.

Context map around Giordano Bruno crater (centered 107°E, 34°N). LROC WAC 100 m/p monochrome mosaic overlayed by optical maturity parameter (OMAT) [Lucey et al, 2000] generated from Clementine UVVIS data (200 m/p). Blue corresponds to younger immature material, and red is an older and more mature surface. White dashed box corresponds to the footprint of today's featured, NAC frame [NASA/GSFC/Arizona State University].

Explore the Giordano Bruno ejecta blanket NAC frame!

Reference: Lucey et al. (2000) JGR, v105, no E8, p20377-20386.

Previous post showing floor of Giordano Bruno crater.

Published by Hiroyuki Sato on 22 November 2010