Debris flow extending down the southwest wall of Janssen K
crater (a highlands crater about 16 km in diameter). Image width
is 570 meters (NASA/GSFC/Arizona State University). Two separate
debris flows extend down the western interior wall of the the
impact crater Janssen K (46.1° S, 42.3° E). A portion of one
flow is observed in the upper left of the image, and a larger
one extends from the bottom center. The bumpy terrain between
the two flows is the underlying crater wall. These flows extend
from the upper reaches of the inner crater wall (having traveled
across ~4.5 km of the inner crater wall) and are composed of
loose debris. The debris lobes and the loose rocks cover a sheet
of impact melt that fills the crater floor. Did these debris
flows form as part of the impact process, or did they form later
seismic processes due to a nearby impact? Browse the whole NAC
Image and see if you can find clues to help determine when these
flows formed!