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1
Geological Survey Professional Paper
6), aphanitic dolomite, and conglomerate composed of rounded clasts of the
oolitic dolomite. Unit 6 is 81 m thick and is composed of pale-red and greenish-
gray siltstone to very fine grained sandstone and, in the lower half of the unit, two
...
Geological Survey (U.S.),
1984
2
Lithics: Macroscopic Approaches to Analysis
This book is a fully updated and revised edition of William Andrefsky Jr's ground-breaking manual on lithic analysis.
William Andrefsky, Jr,
2005
3
United States Geological Survey Professional Paper
Colin. D1665 CO— 10 Limestone, silty, light-giay; weathers yellowish gray in silty
part 3 Limestone, evenly laminated, very silty ; weathers yellowish gray 6
Limestone, aphanitic, resistant; in thick beds, finely and irregularly laminated;
weathers ...
4
Sedimentary Provenance and Petrogenesis: Perspectives from ...
Ternary diagrams showing Gessi Formation sandstone compositions with 99%
confidence regions of the mean after Weltje (2002): Qm (monocrystalline quartz),
F (feldspar), and Lt (aphanitic lithic fragments and fine-grained polycrystalline ...
José Arribas, Salvatore Critelli, Mark J. Johnsson,
2007
5
Igneous and Metamorphic Petrology
Aphanitic texture implies high crystal nucleation rates relative to growth rates,
such as occur during rapid reduction in T or water content of the magma system.
Relatively few aphanitic rocks are aphyric, or non-porphyritic. The presence of ...
6
The Supai Group of Grand Canyon
Edwin Dinwiddie McKee. Section 23— Continued PARASHANT CANYON-
Continued Feel Supai Group — Continued Manakacha Formation, cliff unit —
Continued Limestone, reddish-gray, aphanitic; contains jasper bands; forms cliff
4.5 ...
Edwin Dinwiddie McKee,
1982
7
Evolution of an Andean Margin: A Tectonic and Magmatic View ...
Block from andesitic breccia, aphanitic, dark gray, on road between Andacollo
and Guanacos, 37°11.27'S, 70°41.45'W, 1133 m. (3) ESA7. Dike, aphanitic
porphyritic with hornblende pheno- crysts, on road between Andacollo and
Cayanta, ...
Suzanne Mahlburg Kay, Víctor A. Ramos,
2006
8
Cerro de Las Ventanas: A Northern Mesoamerican Frontier Site ...
Material Description Colors Observed Total Percent 5A: Silicified, light cherts (
silex). Aphanitic textures, conchoidal fracturing properties, silica constituent
appears to be light-colored cherts. Colors are opaque, and include yellows (
10YR 7/6), ...
Elizabeth Anne Oster,
2007
Aphanitic textures contain small crystals less than 1 mm in diameter that are not
generally discernible to the eye. With the use of a microscope or other analytical
means, geologists can determine the composition and relative sequence of ...
Kevin Hefferan, John O'Brien,
2010
10
Igneous Rocks by Texture:
Aphanitic Rocks, Ophitic Rocks, ...
Purchase includes free access to book updates online and a free trial membership in the publisher's book club where you can select from more than a million books without charge.
General Books LLC, LLC Books,
2010
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Osisko Intersects 2.26 g/t Gold Over 128 Metres at Kirkland Lake
The host rock is an aphanitic, pinkish gray to brick red, commonly microbrecciated lithology (felsite) that completely replaces well laminated ... «Marketwired, 2월 14»
Rapping About Darwin, for Knowledge and Glory
“I can tell you something 'bout an aphanitic.” On a screen behind him, the last word linked to a note explaining that it meant a volcanic rock. «New York Times, 6월 13»