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4th Gallery: Geology of Paleozoic sections of Lumsdin's Bay, Booley Bay, Duncannon Point and Strand on west side of Hook Head, SW Coast Co Wexford, Eire
Introduction
This is the fourth page which links to a gallery of diagrams and photographs that illustrate the geology of the Paleozoic rocks that outcrop on Hook Head in South West County Wexford. The photographs were taken by Christopher Kendall on a field trip lead by Peter Haughton and Ian Somerville of the University College of Dublin of Ireland. If you wish to read an introduction to the Geology of Hook Head click on the highlighted words to left.
The photographs occur in same order the outcrops of Hook Head were visited on this trip and the stops immediately below are from Lumsdin's Bay to Duncannon Beach.
Lumsdin's Bay on west side of Hook Head
Carboniferous Porter's Gate Formation sandstones of the near shore beach to barrier setting that grades coarse to finer cross bedded sands and shales into carbonates. Some the carbonates are fossiliferous mudstones that are inter bedded locally with shale to siltstone of an offshore shelf setting. These sediments were subjected to wave sorting and rippling! This section shows evidence of faulting which causes the section to be repeated!
Booley Bay near Duncannon on west side of Hook Head
Late Cambrian Booley Bay Formation is composed of fine grained sands and shales. These thin bedded fine quartz sands, silts and shales show small scale slumping and locally current ripples. The thickness of the beds varies randomly around one centimenter to around ten centimeters, locally reaching no more than twenty centimeters. Beds have sharply defined continuous surfaces and these beds are thought to have collected below wave base. Bedding planes show evidence of Ediacaran like Ichno Fossils occur as does elephant skin mottling which is thought related to microbial mat development. They show some evidence of Variscan structural deformation, including tight folding.
Duncannon Point and Strand on west side of Hook Head beneath the town of Duncannon
Ordovician Caradocian Caradocian rocks that include andesitic lavas, pillow lavas, ash and graptolitic shales and silts.
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