Dolerite

Definitions

  • Webster's Revised Unabridged Dictionary
    • n Dolerite (Petrography) A dark, crystalline, igneous rock, chiefly pyroxene with labradorite.
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Century Dictionary and Cyclopedia
    • n dolerite A name given by Haüy to a rock of the basalt family, called by some a basaltic greenstone, the deception implied in the name referring to the difficulty of distinguishing the rock from other varieties also designated as greenstone. As limited at the present time, dolerite includes the coarser-grained varieties of basalt, in which the component minerals can be detected by the naked eye. See basalt and greenstone.
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Chambers's Twentieth Century Dictionary
    • n Dolerite dol′er-īt basaltic greenstone.
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Etymology

Webster's Revised Unabridged Dictionary
Gr. dolero`s deceptive, because it was easily confounded with diorite
Chambers's Twentieth Century Dictionary
Fr.,—Gr. doleros, deceptive, it being hard to distinguish from real greenstone.

Usage

In literature:

It stood on edge, and several dikes of basalt, with dolerite, had cut through it.
"Missionary Travels and Researches in South Africa" by David Livingstone
In the center of the Island is the Susong-Dalaga (maiden's bosom), a dolerite hill with a beautifully formed crest.
"The Former Philippines thru Foreign Eyes" by Tomás de Comyn
Material: a grey or a white limestone most usual; tufa and dolerite also used.
"How to Observe in Archaeology" by Various
Darwin and collected some dolerite, the only rock he could see on the Nunatak, which was nearest.
"The Worst Journey in the World, Volumes 1 and 2" by Apsley Cherry-Garrard
There is greater variety in texture, from fine aphanitic traps up to coarse grained dolerites with feldspars one-third of an inch long.
"History and Comprehensive Description of Loudoun County, Virginia" by James W. Head
Dolerite, phosphoric acid in, 202, 211.
"Manures and the principles of manuring" by Charles Morton Aikman
DIABASE, in petrology, a rock which is a weathered form of dolerite.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3" by Various
The rocks consist chiefly of basalt, dolerite, melaphyre and felstone.
"Volcanoes: Past and Present" by Edward Hull
It is composed of a prehistoric grey labradorite, and of doleritic lava.
"Etna" by G. F. Rodwell
This produces the ophitic structure (very common also in the dolerites).
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5" by Various
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In science:

Even if the relatively small spots were only dark, and not wet (i.e., dark dolerite blocks, or a brecciated basalt), their uniqueness in the otherwise white & tan outcrop would have drawn our immediate attention.
Field Geology with a Wearable Computer: First Results of the Cyborg Astrobiologist System
Even if the relatively small spots were only dark, and not wet (i.e., dark dolerite blocks, or a brecciated basalt), their uniqueness in the otherwise white & tan outcrop would have drawn our immediate attention.
Field geology with a wearable computer: 1st results of the Cyborg Astrobiologist System
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