Andesite in oceanic regions

Stewart, Dion C.; Thornton, Charles P.

doi:10.1130/0091-7613(1975)3<565:aior>2.0.co;2

Geol

1975

DOI: 10.1130/0091-7613(1975)3<565:aior>2.0.co;2

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Andesite in oceanic regions

Dion C. Stewart

Charles P. Thornton

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Cited by 7 publications

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“…following Stewart & Thornton (1975), but the present discussion is only concerned with the principles): With such a system, it will always be apparent which Clan an author is referring to when using a particular rock-name. For the andesitic rocks, such a classification might look like this (other N. M. S. ROCK actual names could have been used, e.g.…”

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confidence: 99%

How should igneous rocks be grouped?

Rock

1981

Geol. Mag.

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SummaryDespite their importance and frequency of usage, ‘grouping terms’ in petrology such as Association, Family, Lineage, Province, Series and Suite appear to lack established meanings. Partly by analogy with the recently standardized stratigraphic nomenclature, hierarchies of such terms are suggested to cover petrographic classification (rock-names), petrological classification (rock-names extended to magma-types), geographic classification (igneous provinces) and tectono-genetic classification (rock assemblages characteristic of particular tectonic regimes). Used in this way, the exact implications of each term become clearer. Again by analogy with stratigraphy, ‘Super-’ and ‘Sub-’ groupings are suggested in a few cases: ‘Subprovince’ for example can differentiate distinct rock assemblages related to separate parent magmas within one well-defined Province (e.g. nephelinite-carbonatite and basalt-trachyte assemblages in the East African Rift), and ‘Superprovince’ can be used to group coeval Provinces now separated by opened oceans, etc. (e.g. Thulean Superprovince composed of Hebridean, East Greenland, etc., Provinces). The term ‘Province’ itself carries several ambiguities; it is best confined to cases where the ages of the spatially associated igneous rocks fall within a narrow range (e.g. Oslo Province); ‘Belt’ is suggested for those where the age-range is more substantial (e.g. Jurassic-Tertiary magmatism of Southeast Brazil).

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confidence: 99%

How should igneous rocks be grouped?

Rock

1981

Geol. Mag.

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Neogene and quaternary volcanism of the Bijar Area (Western Iran)

et al. 1976

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Acid and basic late neogene volcanism in central aegean sea: Its nature and geotectonic significance

et al. 1982

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Andesite in oceanic regions

Cited by 7 publications

References 0 publications

How should igneous rocks be grouped?

How should igneous rocks be grouped?

Neogene and quaternary volcanism of the Bijar Area (Western Iran)

Acid and basic late neogene volcanism in central aegean sea: Its nature and geotectonic significance

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