gabbro$30603$ - meaning and definition. What is gabbro$30603$
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What (who) is gabbro$30603$ - definition

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         
  • Gabbro specimen
  • [[Photomicrograph]] of a [[thin section]] of gabbro
  • QAPF diagram with the gabbro field highlighted in yellow. Gabbro is distinguished from diorite by an anorthosite content of greater than 50% of its plagioclase and from anorthite by a mafic mineral content greater than 10%.
  • QAPF diagram with the gabbroid/dioritoid fields highlighted in yellow. Gabbroids are distinguished from dioritoids by an anorthosite content of greater than 50% of their plagioclase.
  • A gabbro landscape – the main ridge of the [[Cuillin]], [[Isle of Skye]], [[Scotland]]
  • Mineral assemblage of igneous rocks
  • [[Zuma Rock]], Nigeria, a massive, nearly uniform, intrusion of gabbro and [[granodiorite]].
  • Cizlakite sample
MAFIC INTRUSIVE IGNEOUS ROCK
Gabbros; Gabro; Gabbroic; Gabbroid
['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'.
Gabbro         
  • Gabbro specimen
  • [[Photomicrograph]] of a [[thin section]] of gabbro
  • QAPF diagram with the gabbro field highlighted in yellow. Gabbro is distinguished from diorite by an anorthosite content of greater than 50% of its plagioclase and from anorthite by a mafic mineral content greater than 10%.
  • QAPF diagram with the gabbroid/dioritoid fields highlighted in yellow. Gabbroids are distinguished from dioritoids by an anorthosite content of greater than 50% of their plagioclase.
  • A gabbro landscape – the main ridge of the [[Cuillin]], [[Isle of Skye]], [[Scotland]]
  • Mineral assemblage of igneous rocks
  • [[Zuma Rock]], Nigeria, a massive, nearly uniform, intrusion of gabbro and [[granodiorite]].
  • Cizlakite sample
MAFIC INTRUSIVE IGNEOUS ROCK
Gabbros; Gabro; Gabbroic; Gabbroid
Gabbro () is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is chemically equivalent to rapid-cooling, fine-grained basalt.
Gabbro         
  • Gabbro specimen
  • [[Photomicrograph]] of a [[thin section]] of gabbro
  • QAPF diagram with the gabbro field highlighted in yellow. Gabbro is distinguished from diorite by an anorthosite content of greater than 50% of its plagioclase and from anorthite by a mafic mineral content greater than 10%.
  • QAPF diagram with the gabbroid/dioritoid fields highlighted in yellow. Gabbroids are distinguished from dioritoids by an anorthosite content of greater than 50% of their plagioclase.
  • A gabbro landscape – the main ridge of the [[Cuillin]], [[Isle of Skye]], [[Scotland]]
  • Mineral assemblage of igneous rocks
  • [[Zuma Rock]], Nigeria, a massive, nearly uniform, intrusion of gabbro and [[granodiorite]].
  • Cizlakite sample
MAFIC INTRUSIVE IGNEOUS ROCK
Gabbros; Gabro; Gabbroic; Gabbroid
·noun A name originally given by the Italians to a kind of serpentine, later to the rock called euphotide, and now generally used for a coarsely crystalline, igneous rock consisting of lamellar pyroxene (diallage) and labradorite, with sometimes chrysolite (olivine gabbro).

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.