Month: December 2014

Peering into the depths! The geology of Fogo Island, Newfoundland. Fogo comprises a composite granite-gabbro intrusion which has been emplaced along the bedding of its host rocks. This stratiform magma chamber is 7km thick and tilted on its side, so that its contents are well exposed. It was the very hot gabbro magma which melted the lower crust to produce…

Read More IGA Lecture: Dr. Peadar McArdle (Geological Survey Of Ireland)