Bathym etrical Survey of the Scottish Lochs. 
I Drift— Clay, Sand & Gravel 
I Lower Old Red Sandstone 
1 Greywacke, Limestone, Black 
J Shale, Radiolarian Chert 
I Limestone 
I Mica Schists 
■ Clay Slate 
Schistose Grit & Greywacke 
