BRN 9-2 (uncompressed) - Flipbook - Page 83
Clicking on the ÒFind additional. . .Ó
link generates a listing like that
shown at the bottom of the page. The
listing is speciÞc to the geographic
area you are surveying and links are
provided for all of the papers. In this
case there are 1666 listings. Also
note that you can screen the listing by
the size of a geologic map which may
be associated with it.
Cooperative National
Geologic Map
The US Geological Survey and the
Association of American State
Geologists have worked together to
produce a wonderful resource for
those interesting in exploring the
geology of our area - or of any part of
the Òlower 48Ó (when I lived in Alaska
many years ago that term was more
than a geographic description).
One product of the effort is shown at
the top of the following page. It is the
geologic surface of the United States
arrayed by age. It like all other
products is ÒzoomableÓ. Zoom in on
our area and you are able to see
something like that depicted at the
bottom of the following page. The
map at the top of the following page
is interesting, the one at the bottom is
very interesting. It has a signiÞcant
amount of information.
To access this material click the
appropriate link in the ellipse at the
bottom right of the page (see below).
Follow the Òother geologic maps in
this areaÓ link to generate something
like that above. Highlight an area (red
box on the right) and a reference map
detail shows on the left. All of these
maps may be accessed using this tool.
Access this resource at this link, and
have fun. There is much more at this
site than described here!
Using one of the Þlters within the
ellipse on the map above it is possible
to view just the surface rock from a
particular age (Phanerozoic, Cenozoic,
Tertiary, Paleogene, Oligocene, or
Chattian).
Check the
small blue
box within
the ellipse at
the right to
include a unit
description
for each of
the geologic units depicted on the
map you are reviewing. An example
of that feature is shown at the top
center of this page and in the image
at the bottom of the following page.
Reviewing original source materials is
also possible with the application.
This feature highlights two types of
material, maps and scientiÞc papers.
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