188 Reports & Proceedings — Yorkshire Geological Society, 



product, a type of rock hitherto undescribed, and provisionally 

 termed a biotite-porphyrite. The paper concluded with a discussion 

 of the metamorphism induced by the dolerites, which has resulted 

 in the production of spilosites and adinoles among the contact 

 rocks. 



lOth January, 1922.— Professor P. G. H. Boswell, O.B.E., D.Sc, 

 F.G.S., President, in the chair. 

 The following communications were read : — 



(1) " On Peaty Bands in the Wallasey Sandhills." By W. G. 

 Travis. 



The principal band described is exposed on the seaward face of 

 the dunes which fringe the Wallasey shore, and with the exception 

 of one considerable gap where the dunes are broken down is visible 

 for a distance of 1 mile 700 yards. The thickness on the whole i& 

 from 6 to 9 inches. A detailed study of the plant remains of the 

 bands has been made, which has revealed an abundant moss flora,' 

 including nine species of Hypnum, several of which have never 

 been found in a living state in the Wirral peninsula. From the 

 evidence of these plant remains, and more especially the 

 characteristic assemblage of mosses, in conjunction with the 

 circumstances in which the remains are preserved, it is clear that 

 these bands of peaty sand and silt are deposits which were 

 accumulated in wet dune " slacks " such as occur in the flats or 

 hollows among the sandhills on the Lancashire coast. They 

 indicate the former existence of physical conditions in the Wirral 

 dunes which do not now obtain. The correlation of the bands with 

 similar superficial deposits recorded by previous observers was 

 discussed. 



(2) " Note on some fractured pebbles from Point Cranstal, 

 I.O.M." By W. A. Whitehead, B.Sc. 



A brief description was given of the glacial deposits in the neigh- 

 bourhood of Point Cranstal, also known as Shellag Point, about 

 4 mUes north of Ramsey town. The gravels and sands are .often 

 cemented into hardpan known locally as " scrablag ", and the 

 fractured and subsequently cemented pebbles occur in association 

 with this. Several specimens were described, and their significance 

 and mode of origin considered. 



Yorkshire Geological Society. 

 llth November, 1921. 

 Mr. W. S. Bisat : Some Goniatite Zones in the Millstone Grit 

 Series. 



In the Millstone Grit Series of Yorkshire are a number of thin 

 bands containing marine fossils, and layers of shale crammed with 

 goniatites are frequently met with in these marine bands. The full 

 succession has not been wholly worked out, but six zones are 



