ON THE TERTIART (mIOCENE) FLORA, ETC. 



107 



Second Re/poi't of the Committee, consisting of Professor W. C. 

 Williamson and Mr. W. H. Baily, appointed for the pur- 

 pose of collecting and reporting on the Tertiary {Miocene) 

 Flora, &c., of the Basalt of the North of Ireland. Dratvn up by 

 William Hellier Baily, F.L.S., F.G.8., M.R.I.A. {Secretary). 



[Plates II. & III.] 



Since the first report on this subject, presented to the Association at 

 their last meeting in 1879, the Secretary, Mr. W. H. Baily, accompanied 

 by assistants, has again visited the localities from which these interest- 

 ing plant-remains were obtained, as well as some collections from the 

 same places made by scientific gentlemen in the neighbourhood. He 

 would especially mention William Grray, Esq., M.R.I.A., of Belfast ; the 

 Rev. Canon Grainger, D.D., of Broughshane ; and Walter Jameson, Esq., 

 Glenarm, manager of the Eglinton Chemical Works, Glasgow and Glen- 

 arm, who most obligingly afforded him every facility for carrying out his 

 investigations. 



To the last-named gentleman he is indebted for the following section 

 of the Miocene deposits between the Upper and Lower Basalt at Libbert, 

 one mile south of Glenarm, county of Antrim, who carried out the exca- 

 vations there for the Eglinton Chemical Company, and to whose zeal and 

 ability in the undertaking be is happy to be enabled to testify. 



Section showing ihe Position of the Leaf-heds at Libhert, near Glenarm, 

 County Antrivi. — 700 feet elevation above sea-level. 



^K >< X X 

 ! X X. XXA 

 !>< X XXX 



I X .< X X >; 

 X X X X 



13 



' y ;^ X X X 



Ix ,xxxx> 

 '< X X X X 

 X X X X X 



X >^ XXV 

 X :< X XX 



- X X X ,X >( 



Upper Oasalt, denuded, and of variable thickness. 



Thin Lignite Band. 



' Bauxite ' : Aluminous marl. 



Red and variegated clays, marls, and conglomerates. 

 Leaf -bed. 



Lower or Amygdaloid Basalt, about 300 feet thick. 

 White Limestone = Chalk, estimated thickness 250 feet. 



The series of Miocene deposits at this place was found to alter con- 

 siderably on further excavation, the bauxite or aluminous marl being 

 gradually replaced by pisolitic iron ore, accompanied by a different 

 arrangement of the associated clays and marls. 



This band of aluminous earth termed bauxite, which was alone sought 



