local sandstone and then crystallised. The thickness of the igneous rock is estimated at 42-49 m. It extends in a general north-easterly direction from Lugar, 2.5 Km beyond the village of Cronberry. Its composition overall is outer Teschenite units and a thick core of layered Theralite and Picrite including Lugarite, (a coarse-grained rock consisting of euhedral crystals of titanaugite and Kaersutite up to 7cm long with corroded feldspars and ilmenite set in a cloudy greyish base of analcime, nepheline and alteration products}. The sill represents a nearby magma source differentiating in situ'' to give sequentially injected layers of slightly different petrochemical composition. Ironworks 1845 - Lugar Ironworks opened 1848 - Muirkirk Branch of the Glasgow and South Western Railway, Auchinleck to Muirkirk opened. The line served the Lugar Ironworks, the Muirkirk Ironworks and various coalmines 1856 - Lugar Ironworks bought by the Eglinton Ironworks Ltd 1928 - Lugar Ironworks closed. Site later used by the National Coal Board as regional headquarters and workshops. External links Railscot page on Lugar Ironworks YouTube video of the Lamargle Or Lugar Rocking Stone Villages in East Ayrshire Ironworks and steelworks in Scotland Populated places established in 1845