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Map of Standard Time Zones of the United States and Adjacent Parts of Canada and Mexico as of January 1, 1948
Map of the United States and surrounding areas with time zones marked and labeled in red. Bodies of water are marked, with depth marked by hatchures, as well as state lines and major cities..
Date:
January 1, 1948
Creator:
Geological Survey (U.S.)
System:
The UNT Digital Library
[Trace Elements Program, Field and Colorado Plateau Projects, February 1948]
Two illustrations showing locations of Trace Elements Offices in the United States and an index map of part of the Colorado Plateau produced for a Febuary 1948 report of the U.S. Geological Survey's trace element investigations.
Date:
1948-03~
Creator:
Geological Survey (U.S.). Trace Elements Office.
System:
The UNT Digital Library
[Figures 1-7: Trace Elements Program Maps]
Maps of Trace Elements Programs field projects, including locations of drill holes for the Colorado Plateau project and location of eastern oil shale in Tennessee.
Date:
1948-06~
Creator:
Geological Survey (U.S.). Trace Elements Office.
System:
The UNT Digital Library