Reports & Proceedings — Edinburgh Geological Society. 139 



different from those found at Gullane, and the Gullane Bed has 

 been placed on the horizon of the Wardie Shales, while the Granton 

 Bed is certainly in the Granton Sandstone Series inmediately below. 



2. " Note on a Find of Manganese Ore in Dalroy Burn, a Tributary 

 of the River Nairn, Inverness." By Thomas Wallace, Inverness. 



Mr. Wallace gives a general description of the district, illustrated 

 by a map and section, showing ,the positions in which manganese 

 ore was found. The chief locality is in the burn near the farm of 

 Dalroy. The ore is there found as a band of possibly 3 feet in 

 thickness, lying immediately under the Old Red Sandstone Con- 

 glomerate, and resting on the Gneiss below. The rock contains 

 30 per cent manganese oxide. Besides the ore in situ, many frag- 

 ments were found in the burn, and also in the fields and at Clara 

 Schoolhouse to the west. 



3. " Exhibition of the Rhomb-Porphyry Boulder from Portsoy, 

 Banffshire." By H. H. Read, H.M. Geological Survey. 



This boulder of typical rhomb-porphyry was found between tide- 

 marks in a cove about 50 yards west of Portsoy Gasworks. Froni 

 the direction of ice-flow in Banffshire it was concluded that transport 

 by Scandinavian ice was extremely unlikely. The possibility of 

 transjDort by floating ice calved from the main Scandinavian ice 

 front, during a period in which a narrow reach of 023en water lay 

 between the Scandinavian and Scottish ice-sheets, was suggested, 

 but the equal possibility of human transport as ship's ballast 

 was also admitted. 



December 17, 1919.— Mr. E. B. Bailey, M.C., B.A., F.G.S, President, 



in the chair. 



" The Ayrshire Bauxitic Clay." By G. V. Wilson, B.Sc, F.G.S. 



The high refractory character of the Ayrshire Bauxitic Clay Avas 

 discovered early in 1916. A sample previously collected by Mr. E. M. 

 Anderson from the exposure on Saltcoats shore had been analysed 

 with the hope that the rock might be a bauxite. The result of this 

 analysis showed that the material was rich in alumina, but mainly 

 in a combined state, and so not available for use in the manufacture 

 of aluminium. On consideration, it seemed possible that a rock 

 containing sucii a high jDercentage of alumina as 17 per cent might 

 possibly be of iise as a refractory, and a small specimen from the 

 locality was sent to Dr. Mellor, of Stoke-on-Trent, by Mr. W. 

 Douglas, of Kilwinning. A test made on this sample gave the un- 

 expectedly high refractory quality of over Seger cone 35 (1770° C). 



About the same time the late Dr. C. T. Clough was working on 

 beds of similar age and character near Kilmarnock. He had 

 specimens collected, and bore the expense of a series of tests by 

 Dr. Mellor. The results, however, showed that the samples taken 

 were not nearly so refractory as the material from Saltcoats- 



