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Thursday 28 April 2011

First day in Dingle - starting at the bottom and working up

We started off on Clogher Head in glorious sunshine and Ken gave us an overview of the surrounding area that we were going to be exploring today. (See the link to my Flickr photostream for photos by the way)
The entire area is large scale, north verging parallel folds of Silurian and Lower Devonian age - apart from one bed of rock which is Devonian conglomerate unconformable on the rest. From Clogher Head we headed on down to Ferriter's Cove where we had an opportunity to look at a parasequence of offshore to tidal flat rocks from the lower part of the Silurian Dunquin Gp. ... livened up by some volcanics - welded ignimbrite with fiamme and, I think, some reworked unwelded ignimbrite.
There is a series of 5 of these parasequences, possibly representing cycles of rising and falling sea level caused by inflation of a magma chamber followed by eruption.
Lunch at the Blasket Centre (one of a number of bowls of seafood chowder I had over the next few days) was followed by a walk along the cliffs to visit a series of locations towards Drom Point: red beds - sandstones, calcretised siltstones and red/grey mottled mudstones deposited on a semi-arid alluvial plain and enlivened by beds of airfall tuff. Some ferricretes, mottled red and grey/green, evidence repeated wetting and drying cycles of playa lakes as the ground water level rose and fell.
Finally, Drom Point gave us an opportunity to see some swaley cross stratification, and some beds full of Chondrites trace fossils.
Back at the B&B in Dingle we had a debrief from Ken before heading out for some more pricey nosh and Guinness

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