Apollo 15 Traverses
Site Image/Traverse Map
Traverse Map only
Diagram based on Apollo 15
Traverses Lunar Photomap Edition 2, Sheet 41B4S4NASA. Hi-res
base photograph NASA AS15-9377[P].
Hadley Rille is a V-shaped gorge paralleling
the Apennines along the eastern edge of Mare Imbrium. The rille
meanders down from an elongated depression in the mountains and
across the Palus Putredinis (Swamp of Decay), merging with a second
rille about 62 miles (100 kilometers) to the north. Hadley Rille
averages about a kilometer and a half in width and about 1,300 feet
(400 meters) in depth throughout most of its length.
Large rocks have rolled down to the rille floor
from fresh exposures of what are thought to be stratified mare beds
along tops of the rille walls. Geologists were curious about the
origin of the Moon's sinuous rilles, and some scientists believe
the rilles were caused by some sort of fluid flow mechanism--possible
Mount Hadley, Hadley Rille and the various
Hadley craters in the region of the landing site are named for British
scientist-mathematician John Hadley (1682-1744) who made improvements
in reflector telescope design and invented the reflecting quadrant--an
ancestor of the mariner's sextant.