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II. — On the Geological Structure of the North-eastern Part of the County 



of Antrim. 



By JAMES BRYCE, Jun., M.A., F.G.S., 



(mEMBF.R of the geological society of DUBLIN, AND OF THE NATURAL 

 HISTORY SOCIETY OF BELFAST.) 



[Read May 2, 1832.] 



(1.) A HE Third Volume of the First Series of the Society's Transac- 

 tions, contains a Memoir by Dr. Berger on the Geological Features of the 

 North-eastern Counties of Ireland. It is preceded by an Introduction from 

 the pen of Mr. Conybeare, and is followed by a Supplement, the joint 

 production of that gentleman and Dr. Buckland. 



The views of the structure of the country given by these authors are, gene- 

 rally speaking, correct ; in many of the details, however, there are errors con- 

 cerning those portions whose structure is anomalous or complex, and are 

 such as strangers might be expected to fall into, who took a rapid survey 

 of the district. Having had opportunities, from my local situation, of ex- 

 amining the North of Ireland leisurely and repeatedly, it was easy for me 

 to become acquainted with the details of its structure ; I propose, therefore, 

 to lay before the Society, in the following brief memoir, the result of my ob- 

 servations. As the remarks will be entirely supplementary, it is unnecessary 

 to repeat anything contained in the memoirs referred to. 



My attention was first called to the peculiarities of this district by Dr. Mac 

 Donnell of Belfast, to whom, previous writers on the North of Ireland, have 

 been largely indebted, and to whom I am anxious to acknowledge my obli- 

 gations. 



(2.) The district I propose to describe, is the north-east corner of Antrim, 

 between Kenbane Head on the north-west, and Garron Point on the south- 

 east ; being about eleven Irish miles long, with an average breadth often miles. 

 It is traversed in a north-west direction by the Aura Mountains, a portion of 

 the great chain which runs parallel to the sea-coast through the whole length 

 of the county, and in this part of its course contains several mountains, varying 

 from one thousand to nearly two thousand feet in height. The principal are, 

 Trostan 1810, Sleiveanee 1782, Knocklayd 1685, Sleive an Orra 1676, and 



