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1
Geological Survey Professional Paper
The relation of visible porosity (measured petrographically) to measured effective
porosity (measured in the laboratory) is shown in table 35.3: A large discrepancy
exists between visible and effective porosities. This discrepancy may be due to ...
Geological Survey (U.S.), 1988
2
The Pottery of Lerna IV
Six of the eleven more coarsely textured Dark-on-Light Painted vases sampled
belong petrographically to Group 2: a narrow-necked jar of Phase 1 (P126), four
equally large open and closed vessels of Phase 3 (P879, P1037, P1 170, P1270)
, ...
3
Petrography Applied to Concrete and Concrete Aggregates
The examined concrete from the upper portions of blocks 36 and 42, where high-
alkali cement without pozzolan was probably used, was petrographically of fair
quality due to weakening of the concrete as the result of alkali-aggregate reaction
.
Bernard Erlin, David Stark, 1990
4
U.S. Geological Survey Professional Paper
These conglomerates include silicic volcanic clasts that are petrographically
similar to Eocene ash-flow tuff units that crop out north of the fault, apparently
limiting the amount of post-40 Ma left-lateral slip to less than about 30 km. Making
the ...
5
Geomaterials in Cultural Heritage
Even so, many of the elements were unusable for analysis because their values
fell below detection limits. From the Nevada Elko site a total of seven lithic
artefacts and six potential source cherts were studied petrographically and
geochemi- ...
Marino Maggetti, Bruno Messiga, 2006
6
Tablemountains of Northern Iceland
The postglacial lava can be distinguished petrographically from the topplateau
dolerite, and Blafjall evidently has a geological history, comparable to that of the
Fjallgardur. Proof of this contention is found in a small area, situated centrally on
...
7
A study of reservoir characteristics of the Nanushuk and ...
Sandstone samples studied petrographically are similar to those of the
Grandstand Formation and Killik Tongue, but are more poorly sorted and contain
significantly more metamorphic rock fragments. A change in source area
between the ...
Geological Survey (U.S.)., James Ellison Fox, 1979
8
Cordilleran Metamorphic Core Complexes
... from differentiation of igneous rocks. Sedimentary rocks occur in two of the
complexes and often display spectacular deformational structures. The most
common undeformed plutons associated with all of the complexes are
petrographically ...
Max D. Crittenden, Peter J. Coney, George Herbert Davis, 1980
Core 124 at 10,010-10,019 feet was petrographically determined as rhyolite. Prof
. Frank F. Grout, Visiting Professor of Geology at Florida State University,
Tallahassee, studied a thin section of Core 124. His report states that flow
structure in ...
10
Physical stratigraphy of the Phosphoria formation in ...
3.1 Claystone, petrographically similar to 15D9o 2.3 Dolomite, clayey, hard,
brownish gray (10YR3/1), massive. Consists of 60 percent dolomite, euhedral to
subhedral rhombs up to 1/64 mm. in diameter; 40 percent ill it e; less than 1
percent ...
Richard Porter Sheldon, 1957
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UVA Rotunda facelift: Contractors begin removing crumbling capitals
They were almost a perfect match, both geographically and petrographically, so we have a high level of confidence that these capitals will ... «Augusta Free Press, 一月 15»
