lamprobolite

lamprobolite

[‚lam·prə′bō‚līt]
(petrology)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Petrological studies of lava flows show several varieties of andesites and dacites, which include hypersthene, hornblende, lamprobolite andesites and hornblende biotite dacite.
Hornblende shows yellowish green to green and lamprobolite light brown to reddish brown pleochroism, whereas both displays well developed sets of 56deg and 124deg cleavages in basal sections.