Page 285 - Laboratory Manual in Physical Geology

B. These are 2011 US Topo
Series products. The digital
map is matched with an U US TOPO TOPOGRAPHIC MAP
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US TOPO TOPOGRAPHIC MAP
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orthoimage of the same area.
(Courtesy of USGS)
1. The orthoimage reveals
that SP Mountain is a
volcano (cinder cone)
with a very visible closed
depression (crater) at its
summit. The image also
reveals an older, reddish
volcano (cinder cone)
that is very eroded (worn
down). Draw a dashed line
on the orthoimage and
map to show the outline of
this older volcano.

2. Draw a solid line on the
orthoimage and map to
show the outline of the
crater of the older volcano.
Why is it not shown with
hachure lines on the map,
like the crater for SP
Mountain?
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U US TOPO ORTHOIMAGE
US TOPO ORTHOIMAGE
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