GEOLOGY

The Geology of South Devon. Devon marble features in Northampton’s splendid Victorian Guildhall and Bob Purser will describe the conditions underwhich this limestone was laid down during the Devonian period, the geology between Torquay in the south and emplaced Dartmoor granite in the north and the covering Triassic red sandstones seen in the railway cuttings at Dawlish and Teignmouth.