392 ]'o>'kshirr Xa/iimlisfs at Guisboroiig/i. 



whole strata of the district. Some time was spent on the 

 shoulders of the conical hill of Roseberry examining; an outcrop 

 of the main ironstone seam, which had been exposed, and here 

 the characteristic fossils of the ^i. spinatus zone were abundant. 

 The top of the hill is 1057 feet above sea-level, and the cap 

 consists of a block of Oolite. From this point there is a widely 

 extended view down the Vale of York, and far over the River 

 Tees into the county of Durham. F"rom here it was pointed 

 out how the hard backbone of the g^reat Cleveland Dyke had 

 caused uneven weathering-, resulting- in a long- ridge having 

 been left marking the line of the dyke. The Gribdale whinstone 

 quarries in the dyke were next visited, under the guidance of 

 Mr. Naughton and the foreman of the quarries. These quarries 

 are in reality underground workings of the dyke, and gave the 

 memoers an excellent opportunity of observing the point of 

 contact between the whinstone and the sandstone through 

 which the dyke had forced its way. On one of the following 

 days some of the geologists were kindly taken by Mr. Charlton, 

 the manager, and his son, over Slape worth Mines, where a 

 further knowledge of some of the problems to be discussed 

 was obtained. 



Another abandoned old alum shale quarry was also visited. 

 Some of the members visited Kildale Woods on the 20th, and 

 particulars of their visit are contributed by the leaders. 



The business meeting- was held at the Buck Hotel, 

 Guisborough, under the presidency of Mr. Charles Crossland, 

 F. L.S., when the reports of the various sections were given, 

 and these will be found elsewhere. 



Afterwards a meeting was held under the presidency of 

 Mr. J. J. Burton, when a paper, illustrated by maps and 

 diagrams, was given by Mr. Cosmo Johns, F.G.S., on 'Jurassic 

 Ironstone Deposits of Great Britain.' 



A paper contributed by Dr. H. C. Sorby, F.L. S., was also 

 read on the 'Origin of the Cleveland Ironstone,' and has since 

 appeared in this journal. 



As the two papers were on different phases of the same 

 subject, they were taken together in the discussion which 

 followed, ;uui which was taken up with much interest by a 

 considerable number of those present. 



A paper by Mr. M. B. Cotsworth on ' The Continuous 

 (ilacial Period ' was also read, but owing to the late hour the 

 discussion was postponed, and subsequently resunied, when 

 some of the ingenious and occasionally startling theories of the 



Naturalist, 



