Geological Survey of Scotland, 1:50,000
Sheet 33W and part of 41 – Haddington – published 1983
Bright green is olivine-basalt or dolerite, an igneous rock which comes from the volcanoes of the Garleton Hills and shapes Gosford Bay. Mid blue and darker blue bands are a mix of sandstones, siltstones, mudstones and marine limestones which form the Craigielaw peninsula. The grey-brown is calciferous sandstone, with a softer sandy upper layer, which has worn away to form Aberlady Bay. Orange is trachyte, a fine-grained igneous rock that can be pale buff or pink.