﻿Pig. 1. — SJcetcJi-onap of the stratigraphy of Colotuay and Oronsay, 



to shoiv the structure, (Scale : 2 miles = 1 inch.) 



Gfi/ass 



MILLEUSE GROUP 



KILCNATTAN 

 GROUP 



niLLQUlZ GROUP 



MACHff/N3 GROUP 



COLO /V SAY UMESrOh'ii. 

 KlLOnAti FLAGS 

 'MILLBUJE GROUP 



OR ON SAY MUDSTONEIS 



ORONQAY SANDSTONES 



r 



^^M STAOSiJNMS DAP.K PHYLUTES 

 'PP^R^ COLOUSAY LUilESTQIiE 

 ]^^^KILORAN FLAGS 



S'JMILLBU/E GRITS £i- PHYILJTES 



^^^KILCHATTAM PHYLLITES &SAI:DST0NES 

 ^,'7<\ MACMRWS SmT2 ,^ MUDSTONES 



j-'.-.'-'.-W OROliSAY MUDSTOliESS:SAlil>STONES \1^o%^o\ DUNGALLAIN LPIDOTIC GRITS 

 ^^^PIUTON/C mTRUSIVE MASSES 

 K^Kentallenits S^ Syenite D'Dioritc ^^-^ Dip of Strata 



[The rock-groups, though in some cases constant, exhibit in others great lateral 

 variation. The dips shown in the map have been selected to illustrate the 

 main structure. There is much minor complication due to folding.] 



