A. McEennj—Trachytic Rocks of Antrim. 263 



It may liere be mentioned that those two plant localities are on 

 the same geological horizon, namely, that of the widely extended 

 pisolitic iron-ore zone of the county. The Ballintoy lignite, iron- 

 ore, and Bauxite Mines are also on this horizon. 



Fig. 3. 

 Ballvpalady section, 1^ miles north-east of Templepatrick. 



|!mTi"*iTT^''j Upper Basalt (compact and often columnar). 



Brown laminated sliale and volcanic asli (?). 

 Laminated brown impure earthy lignite. 



Brown and red variegated clays, marls, and sandy 

 beds, with irregular layers of coarse conglomerate, com- 

 posed of rounded and subangular fragments of trachyte 

 and basalt. 



Brown, red, and yellowish laminated marl, mud- 

 stones, and bole, with occasional layers of fine con- 

 glomerate (trachytic and basaltic), pisoHtic iron- ore 

 band, and plant beds. 



Lower Basalt (amygdaloidal) . 



The trachyte-pebbles and fragments in this place (Libbert) are of 

 the type of rock that occurs in the great mass at Tardree Mountains, 

 to the south-west. I have observed this trachyte gravel m two or 



Fig. 4. 

 Libbert Mine section, Glenarm. 



Upper Basalt (compact black) . 



Lignite. 



Bauxite. 



:>o. 



Whitish, grey, and variegated laminated trachytic 

 clay, marl, sand beds, and pebbly trachytic con- 

 glomerate. 



Whitish and grey fine-grained laminated trachytic 

 beds, with plant remains. 



Lower Basalt (amygdaloidal). 



three other places between Glenarm and Tardree, and I have no 

 doubt that it also exists in many other localities m county Antrim. 



