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
New remote sensing techniques were developed to delineate zones of altered
rocks associated with ore deposits . Genetic models of epithermal gold - alunite
ore deposits and a number of new exploration techniques to aid in the conduct of
...
New remote sensing techniques were developed to delineate zones of altered
rocks associated with ore deposits . Genetic models of epithermal gold - alunite
ore deposits and a number of new exploration techniques to aid in the conduct of
...
Page 41
... the presence or absence of the following : adequate source beds and reservoir
rocks , adequate trapping mechanisms ... and the presence of favorable
sedimentary rock sections underlying volcanic terrane or faulted and overthrust
areas .
... the presence or absence of the following : adequate source beds and reservoir
rocks , adequate trapping mechanisms ... and the presence of favorable
sedimentary rock sections underlying volcanic terrane or faulted and overthrust
areas .
Page 62
The oldest rocks of the island arc are at least 110 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 110 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
Despite the enormous amount of untapped water in the Floridan , the water ia not
always locally available for use . This aquifer system is a sequence of
hydraulically connected carbonate rocks ( principally limestone with some
dolomite ) that ...
Despite the enormous amount of untapped water in the Floridan , the water ia not
always locally available for use . This aquifer system is a sequence of
hydraulically connected carbonate rocks ( principally limestone with some
dolomite ) that ...
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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 |