THE 



QUAETERLY JOUENAL 



OF 



THE GEOLOGICAL SOCIETY OF LONDON. 



PROCEEDINGS 



OF 



THE GEOLOGICAL SOCIETY. 



Maech 24, 1858. 



George C. Greenwall, Esq., Radstock, near Bath, Samuel Dobson, 

 L. ^., Treforest, Glamorganshire, Joseph James Forrester, Esq. 

 (Baron de Forrester), Oporto, Henry Becket, Esq., Wolverhampton, 

 William Fletcher, Esq., Tarn Bank, near Cockermouth, George 

 Highfield Morton, Esq., London Road, Liverpool, Elkanah Billings, 

 Esq., Montreal, and George Eowdon Bumell, Esq., 14, Lincoln's Inn 

 Fields, were elected Fellows. 



The following communications were read : — 



1. On a Protrusion of Siltjeian Rock in the Noeth of Ateshiee. 

 By J. C. MooEE, Esq., F.E.S., F.G.S. 



The productive coal-fields of Ayrshire terminate abruptly to the 

 north at the town of Ardrossan, from whence, for some miles along 

 the coast, red sandstones and conglomerates prevail. These are 

 correctly coloured in the maps of PhiUips and of Sharpe as Old Eed 

 Sandstone, though I am not aware upon what precise grounds. At 

 Ardrossan, and for two or three miles at least to the north, the two 

 formations are caused by a fault to abut against each other ; so that 



VOL. XV. PAET I. B 



