510 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Julie 17, 



of Cromarty : — Accompanied by Mr. Stables, Mr. Joass, and Major 

 H. Drummond, of the Bengal Engineers, I spent the whole of one 

 day on and around the Nigg, or North Sutor of Cromarty. We ex- 

 amined it minutely in reference to the sketch sent to Sir R. I. Mur- 

 chison by Miss C. Allardyce. This sketch represents the Oolites lying 

 conformably to the Old Red Sandstone, and as if they occurred on 

 the ivest or inner side of that Sutor, namely the northern one*. 



We examined all the bits of rock or strata that were to be seen 

 cropping out along the Cromarty Firth shore of the North Sutor, 

 and found in them nothing but Old Red Sandstone. 



We then proceeded down the Moray Firth as far as Shandwick, 

 landing at different points, and walking along almost the whole 

 shore, spending a considerable time at Gaan Righ. Here, so far 

 as we could see, the Oolites first appear. Covered at high water, 

 and lying at the base of a cliff about 250 feet high, these Gaan- 

 Righ Oolites are evidently an extension of the well-known deposit 

 of the same series at Shandwick. The tide was low, and most 

 favourable for our work over this part of the coast. 



The complete unconformity of the Shandwick Oolitic beds to the 

 Old Red Sandstone is acknowledged on all hands ; and the seeming 

 conformity of the Oolitic beds at Gaan Righ to the Old Red arises 

 from the accidental change of dip (caused by a fault, or rather by a 

 slip or slide) in a large mass of the rock (Old Red) in the overhang- 

 ing cliff. The strata of this mass, if projected on their present 

 plane, would most probably overlie the Oolites ! The persistent 

 northern dip of the Old Red Sandstone, in this line of coast all the 

 way down to Shandwick, comes out distinctly, when seen, as on our 

 return to Cromarty, from the boat when sailing in the offing. 



Faults and slips there are in many places, but they do not present 

 any difficulty. I am, therefore, convinced that the great question at 

 issue — the age of our Reptiliferous beds — is not in the least affected 

 by any appearance presented by the Oolites at Gaan Righ — the 

 locality, I am persuaded, alluded to by Miss Allardyce in her note to 

 Sir R. I. Murchison.— [G. G.] 



2. On some Tertiary Shells from Jamaica. By J. Carrick Moore, 

 Esq., M.A., F.R.S., F.G.S. With a Note on the Corals; by 

 P. Martin Duncan, M.B., F.G.S. : and a Note on some Nummulinje 

 and Orbitoldes ; by Professor T. Rupert Jones, F.G.S. 



The late Mr. Barrett formed a collection of Tertiary fossils in 

 Jamaica from some beds which were referred to in the ' Geologist ' 

 for 1862, p. 373. The collection was forwarded to Mr. Woodward, 

 who, seeing their relation to the San-Domingan fossils, asked me 

 to examine the Mollusca, while the Corals were submitted to Dr. 

 Duncan. In comparing the Shells with fossil and recent forms, I 



* The examination of the North Sutor was made on May 14. 1863. The 

 sketeh referred to is one by the late Hugh Miller, in the possession of Miss C. 

 Allardyce, Cromarty. 



