Ultramafic rock definition

Ultramafic rock means an igneous rock composed of 90 percent or greater of one or a combination of the following iron/magnesium-rich, dark-colored silicate minerals : olivine, pyroxene, or more rarely
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Ultramafic rock means rocks comprised predominantly dark coloured minerals.
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Ultramafic rock means an igneous rock composed of 90 percent or greater of one or a combination of the following iron/magnesium-rich,
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Examples of Ultramafic rock in a sentence

  • Ultramafic rock and its altered form, serpentine rock (or serpentinite), both typically contain asbestos, a cancer-causing agent.

  • Ultramafic rock, other than serpentine, may also contain asbestos.Known areas of serpentine and ultramafic rock can be located on geologic maps underthe designation of “ultramafic rock units.” The total land area of the State represented by ultramafic rock units is about 1.4 percent, much of which is located in remote areas of northwestern California (DOC, 2000).

  • Ultramafic rock occurs within the western portion of Calaveras County and generally trends north to southwest following the Bear Mountain and Melones Fault Zones.

  • Ultramafic rock, especially in and around earthquake faults has a higher probability of containing asbestos.

  • Ultramafic rock, especially in and around earthquake faults, has a higher probability of containing asbestos.

  • Ultramafic rock, other than serpentine, may also contain asbestos.

  • Ultramafic rock and serpentine exist in several locations in Nevada County, mainly in the western half, but it is unlikely that these materials exist in the project area (California Department of Conservation, Division of Mines & Geology 2000).

  • The second phase involved the assessment of the multiple lithologies encountered within the Precambrian basement, including undifferentiated altered Precambrian basement, granitic rock material, Ultramafic rock that includes ore bearing materials, mafic metavolcanic rock materials, metasedimentary rock materials, and Molson Dike Swarm dikes and sills.

  • Ultramafic rock and serpentine are likely to exist in several areas of western Nevada County; however, the area of the project site is not mapped as an area that is likely to contain natural occurrences of asbestos (California Department of Conservation, 2000, Northern Sierra Air Quality Management District).

  • Ultramafic rock and serpentine exist in several locations in Nevada County, mainly in the western half, but it is unlikely that these materials exist in the project area (Northern Sierra Air Quality Management District).


More Definitions of Ultramafic rock

Ultramafic rock means an igneous rock composed of 90 percent or greater of one or a combination of the following iron/magnesium-rich, dark-colored silicate minerals: olivine, pyroxene, or more rarely amphibole. For the purposes of this section, "ultramafic rock" includes the following rock types: dunite, pyroxenite, and peridotite; and their metamorphic derivatives.
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Ultramafic rock means an igneous rock composed chiefly of one or more iron/magnesium-rich, dark-colored minerals such as pyroxene, amphibole, and olivine; includes, but is not limited to serpentinite, dunite, peridotite, and pyroxenite.
Sample 1
Ultramafic rock means an igneous rock composed chiefly of 90 percent or greater of one or more a combination of the following iron/magnesium-rich, dark-colored silicate minerals such as: olivine, pyroxene, or more rarely amphibole and olivine:. For the purposes of this section, “ultramafic rock” includes, but is not limited to serpentinite, the following rock types: dunite, pyroxenite, and peridotite, and pyroxenite; and their metamorphic derivatives: talc rock, talc schist, and serpentinite.
Sample 1

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