This cache is placed in the USGS Grays Bend Quadrangle in
California. It is the fifteenth in our series of caches placed near
the site for which a USGS 7 ½-minute quadrangle map is named.
Grays Bend is an oxbox of the Sacramento River. It is part of
what the topo maps refer to as “The Old River.” The Lady Bison was
born a Gray but we do not believe that she is related to the
namesake of this bend in the river.
The Grays Bend Quadrangle boundaries are:
N 38º 37’ 30” and N 38º 45’ 00”
W 121º 37’ 30” and W 121º 45’ 00”
The United States Geological Survey (USGS) has many missions. At
one time, a major mission of the USGS was the supplying of
topographic maps of the United States on several scales. Our cache
series is based on the 7.5-minute quadrangle series.
The term quadrangle is used, instead of quadrilateral or rectangle,
because the sides of these blocks are curved. The USGS divided the
United States into quadrangles that are 7.5 minutes by 7.5 minutes.
Since a degree is divided into 60 minutes, a quadrangle one degree
by one degree contains 64 of these quadrangles.