«PLAGIOCLASTIC» 관련 영어 책
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The orthoclastic feldspars may be very readily distinguished from the
plagioclastic by their structure, as revealed by the polariscope ; the latter
invariably are seen to be striped with variously-colored bands, showing what is
called twin ...
2
Etna: A History of the Mountain and Its Eruptions
The inclosures in the larger plagioclastic felspars consist for the most part either
of brownish glass, containing fine dark granular matter—probably magnetite,
which often renders them opaque,—or of matter similar to that which constitutes
the ...
3
A Treatise on Crystallography
They represent two different habits of frequent occurrence amongst crystals of
anorthite and the allied plagioclastic felspars. The axes of reference are taken, as
shown in Fig. 119, parallel to the edges [PM], [Py] and [Ml] respectively; the faces
...
4
Shaw Air Force Base: Test Excavations at 20 Archeological ...
Plain rhyolite without inclusions is designated aphyric (R.1); rhyolite with
inclusions of small white plagioclase feldspar crystals is referred to as
plagioclastic (R.2); rhyolite with quartz crystal porphyry is referred to as
porphyritic (R.3); and finally ...
Maynard B. Cliff, John S. Cable, Gary A. Hebler, 1999
5
The Student's Lyell: The Principles and Methods of Geology, ...
The monoclinic forms, in which the cleavages are at right angles and which are
called orthoclastic felspars ; the triclinic forms, in which the cleavage angle differs
from a right angle and which are said to be plagioclastic felspars; the latter ...
Sir Charles Lyell, John Wesley Judd, 1911
6
Physiography for Advanced Students
Plagioclastic Felspars. — These all crystallise in the tri- clinic system. They are of
different chemical composition, as the following table shows : — Albite, double
silicate of sodium and aluminium (soda felspar). Anorthite, double silicate of ...
Arthur Thomas Simmons, 1897
7
The student's Lyell: a manual of elementary geology
The monoclinic forms, in which the cleavages are at right angles and which are
called orthoclastic felspars ; the triclinic forms, in which the cleavage angle differs
from a right angle and which are said to he plagioclastic felspars; the latter ...
Sir Charles Lyell, John Wesley Judd, 1896
8
An introduction to the study of rocks
Theralites * are crystalline-granular rocks allied to gabbros ; they consist of
nepheline and plagioclastic felspar (with orthoclase), through which dark mineral
constituents (augite, generally biotite, more rarely hornblende) are plentifully ...
British Museum (Natural History). Dept. of Mineralogy, Sir Lazarus Fletcher, 1898
I have somewhat particularly described this structure, as I have known it to be
mistaken for that striation which is founded on by some geologists as a reliable
criterion in the discrimination between orthoclase and the plagioclastic felspars ...
Royal Society of Edinburgh, 1879
10
The Mineralogical Magazine and Journal of the Mineralogical ...
The high gravity is therefore due to this admixture of anorthite- There may be
some question as to the particular plagioclastic felspar with which it is mixed ; but
although the deviation from the composition of typical labradorite is perhaps not
so ...
Leonard James Spencer, 1964
