their course on the map, but had difficulty identifying their route because
they were uncertain of precisely
where they had set Falcon down.
However, Mount Hadley Delta was
clear to see, with St. George Crater—
an enormous gouge the size of two
dozen football fields—on the lowermost slopes and all they had to do
was drive with it on their port quarter
and they knew that eventually they
would come upon the rille.
Cresting the top of a ridge, they
were rewarded with their first unearthly glimpse of Hadley Rille and
gained a clear awareness of its enormous size.
Half an hour after leaving Falcon,
they made their first scheduled halt
at a place called “Elbow Crater”,
right on the rim of the rille at the base
of the mountain. From here, Scott
took a series of pictures of the far
side of Hadley Rille, whose interior
wall showed clear evidence of layering in outcrops not far below its rim,
and th RGv