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XLIV. — Notes on the Geognosy of the Crlf-Fell, 
Kirkhean, and the Needle's Eye, in Galloway. 
By Professor Jameson. 
{Read mh April ISU.) 
The road from the town of Dumfries to New Abbey 
leads through a country composed of transition rocks, 
which are principally greywacke- slate, greywacke, and 
transition clay-slate. One of the most interesting points in 
this tract is Whinny Hill, which rises above the school- 
house of the parish of Traquair, where there is a junction 
of the syenite of the Crif-Fell group with the slate and other 
rocks of the transition series. The syenite in this hill is 
commonly of a grey, seldom of a red colour, and composed 
of grey felspar, green hornblende, grey quartz, and brown- 
coloured mica. The general structure is granular ; some 
varieties, however, are slaty ; while others, besides these 
structures, exhibit also variously formed contemporaneous 
portions of hornblende, of hornblende and felspar, of fel- 
spar and mica, and of felspar and quartz, varying in size 
from an inch to several feet m diameter, whicli give tq 
VOL. IV. N n 
