gabbro$30603$ - translation to English
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gabbro$30603$ - translation to English

STRATIGRAPHIC UNIT IN MINNESOTA
Duluth gabbro; North Shore Volcanic Group; North Shore Volcanics; Beaver Bay Complex
  • Mesabi]] and [[Gunflint Range]]s
  • Duluth's [[Enger Tower]], constructed of local Keweenawan rocks, atop a gabbro knob (foreground)<ref>Sansome (1983), pp. 20–23.</ref>
  • Large anorthosite [[xenolith]] in ophitic ilmenite gabbro in Duluth
  • Layered gabbro near Duluth
  • North Shore Volcanics: [[Palisade Head]] (foreground) and Shovel Point (midground), both rhyolitic extrusions of the Midcontinent Rift; Sawtooth Mountains on horizon
  • Sawtooth Mountains]] rising from [[Lake Superior]]
  • The rugged [[Misquah Hills]]

gabbro      
n. gabbro (speciale steensoort)

Definition

gabbro
['gabr??]
¦ noun (plural gabbros) Geology a dark, coarse-grained plutonic rock consisting mainly of pyroxene, plagioclase feldspar, and often olivine.
Derivatives
gabbroic adjective
gabbroid adjective
Origin
C19: from Ital., from L. glaber, glabr- 'smooth'.

Wikipedia

Duluth Complex

The Duluth Complex, the related Beaver Bay Complex, and the associated North Shore Volcanic Group are rock formations which comprise much of the basement bedrock of the northeastern part of the U.S. state of Minnesota in central North America. The Duluth and Beaver Bay complexes are intrusive rocks formed about 1.1 billion years ago during the Midcontinent Rift; these adjoin and are interspersed with the extrusive rocks of the North Shore Volcanic Group produced during that same geologic event. These formations are part of the Superior Upland physiographic region of the United States, which is associated with the Laurentian Upland of the Canadian Shield, the core of the North American Craton.