Abstract
Sirs, I thank Dr. Field for his valuable additional information to the understanding of the geology of Gruinard Bay. In reply to Mr. Price: I accept that in my effort to be concise over this descriptive work I may have condensed too far the factual basis on which some conclusions are based. I apologize for any confusion my statements have caused Mr. Price regarding the network of metadolerite dykes and their relationships to shear zones in the Gruinard Bay area. I re-emphasize that the network of dykes in question are amongst the largest members of a distinct swarm of dolerite dykes, the larger individual members of which have strike lengths of up to 20 km in length and are up to 150 metres wide.
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