United States Geological Survey Yearbook |
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Page 18
Most of the geologic framework of the Nation's continental margins (shelf, slope,
and rise) is known from a relatively few and widely spaced deep seismic
reflection profiles and a few deep drillholes that recovered rocks from within the
margin.
Most of the geologic framework of the Nation's continental margins (shelf, slope,
and rise) is known from a relatively few and widely spaced deep seismic
reflection profiles and a few deep drillholes that recovered rocks from within the
margin.
Page 39
studies, together with research on igneous terranes, geologic processes, the
ages of rocks, and the Precambrian core of the United States, continue to
produce numerous maps and reports that not only increase the body of scientific
...
studies, together with research on igneous terranes, geologic processes, the
ages of rocks, and the Precambrian core of the United States, continue to
produce numerous maps and reports that not only increase the body of scientific
...
Page 41
The geologic characteristics reviewed for each tract included the presence or
absence of the following: adequate source beds and reservoir rocks, adequate
trapping mechanisms, favorable thermal and maturation histories, presence of ...
The geologic characteristics reviewed for each tract included the presence or
absence of the following: adequate source beds and reservoir rocks, adequate
trapping mechanisms, favorable thermal and maturation histories, presence of ...
Page 62
The oldest rocks of the island arc are at least 1 1 0 million years old, whereas the
youngest volcanic rocks are about 38 million years old. The oldest volcanic rocks
consist chiefly of lava flows that in surface exposures often resemble masses of ...
The oldest rocks of the island arc are at least 1 1 0 million years old, whereas the
youngest volcanic rocks are about 38 million years old. The oldest volcanic rocks
consist chiefly of lava flows that in surface exposures often resemble masses of ...
Page 81
This aquifer system is a sequence of hydraulically connected carbonate rocks (
principally limestone with some dolomite) that vary in thickness from a
featheredge where they crop out to more than 1 ,500 feet where the aquifer is
confined.
This aquifer system is a sequence of hydraulically connected carbonate rocks (
principally limestone with some dolomite) that vary in thickness from a
featheredge where they crop out to more than 1 ,500 feet where the aquifer is
confined.
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Bibliographic information
| Title | United States Geological Survey Yearbook |
| Author | Geological Survey (U.S.) |
| Publisher | The Survey, 1983 |
| Original from | University of Minnesota |
| Digitized | 15 Jun 2009 |
| Export Citation | BiBTeX EndNote RefMan |