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The Goban Spur Paleozoic Basement

Jean‐Pierre Lefort, Jean-Jacques Peucat, J. Deunff, Alain Le Hérissé

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Abstract

Paleozoic basement samples were recovered from two sites on the Goban Spur.The rock from one site is dated as middle Devonian; that from the other is unfossiliferous and could be Devonian or lower Carboniferous in age.The existence of a weak penetrative cleavage in the samples provides a link between the highly deformed upper Paleozoic strata of western Europe and the less deformed Carboniferous rocks known from north of Newfoundland.The low metamorphic grade of the specimens suggests that the main Hercynian metamorphic belt lies south of the sample sites.

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Paleozoic basement samples were recovered from two sites on the Goban Spur.The rock from one site is dated as middle Devonian; that from the other is unfossiliferous and could be Devonian or lower Carboniferous in age.The existence of a weak penetrative cleavage in the samples provides a link between the highly deformed upper Paleozoic strata of western Europe and the less deformed Carboniferous rocks known from north of Newfoundland.The low metamorphic grade of the specimens suggests that the main Hercynian metamorphic belt lies south of the sample sites.

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Available abstract

Paleozoic basement samples were recovered from two sites on the Goban Spur.The rock from one site is dated as middle Devonian; that from the other is unfossiliferous and could be Devonian or lower Carboniferous in age.The existence of a weak penetrative cleavage in the samples provides a link between the highly deformed upper Paleozoic strata of western Europe and the less deformed Carboniferous rocks known from north of Newfoundland.The low metamorphic grade of the specimens suggests that the main Hercynian metamorphic belt lies south of the sample sites.

Key concepts: Paleozoic, Carboniferous, Devonian, Geology, Basement, Paleontology, Metamorphic rock, Late Devonian extinction

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