| Reference Type | Journal (article/letter/editorial) |
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| Title | Metamorphic rocks of an intermediate facies series juxtaposed at the Start boundary, southwest England |
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| Journal | Geological Magazine |
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| Authors | Robinson, D. | Author |
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| Year | 1981 (May) | Volume | 118 |
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| Issue | 3 |
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| Publisher | Cambridge University Press (CUP) |
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| DOI | doi:10.1017/s0016756800035780Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 251919 | Long-form Identifier | mindat:1:5:251919:1 |
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| GUID | 0 |
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| Full Reference | Robinson, D. (1981) Metamorphic rocks of an intermediate facies series juxtaposed at the Start boundary, southwest England. Geological Magazine, 118 (3) 297-301 doi:10.1017/s0016756800035780 |
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| Plain Text | Robinson, D. (1981) Metamorphic rocks of an intermediate facies series juxtaposed at the Start boundary, southwest England. Geological Magazine, 118 (3) 297-301 doi:10.1017/s0016756800035780 |
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| In | (1981, May) Geological Magazine Vol. 118 (3) Cambridge University Press (CUP) |
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| Abstract/Notes | SummaryX-ray diffraction analysis of metamorphic rocks from the Start peninsula shows that the dominant mineral assemblage in the Start schists is quartz-muscovite-chlorite ± paragonite ± albite. The assemblage in the Devonian phyllites to the north of the Start boundary is quartz-muscovite-chlorite and the crystallinity of the white mica there is indicative of greenschist fades. The b0 parameter of white micas indicates that the metamorphism was of an intermediate facies series (Barrovian type), but of a lower pressure variety to the north of the Start boundary juxtaposed against a higher pressure variety to the south. No evidence exists of the high pressure metamorphism needed to support tectonic models in which the Start boundary is identified as a suture representing a Variscan subduction margin. |
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