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dolerite

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
dol·er·ite  (dl-rt)
n. Chiefly British
A dark, fine-grained igneous rock; diabase.

[French dolérite, from Greek doleros, deceitful (from its easily being mistaken for diorite), from dolos, trick; see del-2 in Indo-European roots.]

doler·itic (-rtk) adj.

dolerite [ˈdɒləˌraɪt]
n
1. (Earth Sciences / Geological Science) a dark basic intrusive igneous rock consisting of plagioclase feldspar and a pyroxene, such as augite; often emplaced in dykes
2. (Earth Sciences / Geological Science) any dark igneous rock whose composition cannot be determined with the naked eye
[from French dolérite, from Greek doleros deceitful; so called because of the difficulty of determining its composition]
doleritic  [ˌdɒləˈrɪtɪk] adj

dolerite  (dl-rt)
See diabase.


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? Mentioned in ? References in periodicals archive
 
Coeval activity of this age is represented globally by the Central Scandinavian Dolerite Complex (sills) of the Baltic Shield.
Folk-geology was similarly attuned to reading the landscape for water, prospecting dry river beds for graafwater (spade water) trapped by seekoei gatte (hippopotamus holes) and dolerite dykes and everywhere else seeking out the dolerite water klip (water stone), keerbanke or keerdamme (weirs) indicating and caching underground water.
Bedrock float includes altered metasediments displaying fresh, disseminated pyrite and coarse grained dolerite.
 
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