51 
limestone called the Petworth and Purbeck marbles irom 
Sussex — which are of Wealden age. It is made up of a 
small species of Paludina, imbedded in a blackish-brown 
matrix. The Paludinse are much broken, but the few 
perfect ones exhibit no specific difference in form to those 
in the English Wealden marbles. It is remarkable that 
shaley limestones similar in all respects as to origin and 
species should have been deposited in two localities so 
widely apart as Kent and the Cordilleras of Columbia. 
The Raised Beaches of County Antrim, their Molluscan 
Fauna, and Flint Implements,” by Mark Stirrup, F.G.S. 
Among the clearest evidences of the slow upheaval of 
land and the consequent change in the relative level of land 
and sea., may be cited raised beaches. 
They occur in many places around our shores, often at 
some little distance inland, and at various elevations above 
the present sea level, 
Their height above the sea level is a rough gauge of their 
relative age, and their molluscan fauna of the climatical 
conditions then prevailing. 
On the coast of county Antrim, north east of Ireland 
there are several examples differing alike in position and 
antiquity. 
These Post-Tertiary deposits have been long known, and 
have been noticed by several writers, as the Rev. Dr. 
Grainger of Belfast, Professor Hull, and others. 
The fine section which was exposed at Larne, by the cut- 
ting of the road to the harbour through the deposit, and at 
which I spent a short time last year, had almost entirely 
disappeared on my visit in April of this year. The ground 
had been cleared to build a large coim warehouse for the 
accommodation of the shipping of the thriving port of 
Larne. The mass had apparently been carted to some 
adjoining land. The flint gravels, of which a large portion 
of it consists, have been long used for road metal, for which 
it forms an excellent material. 
