The Iapetus suture zone in England, Scotland and eastern Ireland: a reconciliation of geological and deep seismic data

Article Abstract:

Iapetus suture zone crustal structure is examined via deep seismic profiles of the Irish and North seas. Interpretation of such data is often problematic in that the suture reflectors chosen project to the basement well top, south ofthe Solway Line. A revised method is proposed, involving the identification of the leading end of imbricated Avalonian crust as a common reflectivity boundary. This makes invoking northward suture backthrusting unnecessary.

Plate tectonics, Gondwana (Geology), Gondwana, Paleozoic Era, North Sea, Paleogeography, Laurasia (Geology), Laurasia

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The Antrim-Galway Line: a resolution of the Highland Border fault enigma of the Caledonides of Britain and Ireland

Article Abstract:

A geological study of the Highland Border fault of Caledonides of Britain and Ireland shows significant lineament from Antrim to Galway Bay, known as Antrim-Galway Line. It is probable that Antrim-Galway Line is a continuation of the Highland Border fault of Scotland. The study could help in solving problems related to correlation of Silurian Highland Border fault zone of Scotland with Ordovician Fair Head-Clew Bay Line of Ireland.

Ireland, Scotland

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Sinistral transpression and the Silurian closure of Iapetus

Article Abstract:

An analysis of the Iapetus ocean closure is presented. Conflicting models have been developed to explain the ocean's closure in the area bounded by the terranes of Laurentia, Baltica and Avalonia. Structural and stratigraphic evidence shows that western Avalonia, eastern Avalonia, and Baltica were docked against Laurentia in the Silurian period. The study implies an external cause for northern Applachian and British deformations.

Geology, Stratigraphic, Stratigraphy, Continental drift, Silurian period

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