IGA FIELDTRIP CONNEMARA JUNE 2009
Leader: Barry Long (formally Geological Survey of Ireland)
Why do I always start with the weather? Anyway, as predicted, it mainly remained cloudy and but for a few outbreaks of rain was typically Irish summer. 20 people turned up at Joyce’s of Recess to hear Barry in his inimitable style describe to all and sundry where we were positioned. The northern part of Ireland in late Precambrian times, approximately 750 million years ago, was situated on the equator at the northern margin of proto-Laurentia and deep within the supercontinent of Rodinia. It was joined to the pre-Andean margin of today’s south west Peru, long before the Iapetus Ocean opened in latest Precambrian times. A major ice age (Slush Ball Earth) event is recorded here in the Dalradian rocks.