360 



BATH Y METRICAL SURVEY OF 



doubtless correlated with the curving outline. The contours at 50 feet 

 and 100 feet are continuous. A little over 2 miles from the west end of 

 the loch there is an abrupt narrowing, and the loch continues narrow to 

 the end. Corresponding with this the 200-feet contour is broken into 

 two basins. In the narrow western part is a separate 200-feet basin, 

 with a maximum depth of 262 feet; this is only separated from the 



FIG. 53. LOCH ARKAIG, FROM THE EAST END. 



(Photograph by Mr. James Chinnley.) 



main 200-feet basin by a slight shallowing to 183 feet. The main 200- 

 feet basin is about 8 miles long ; it includes three areas of over 300 feet, 

 which, however, are only separated by very slight shallo wings. The 

 largest of these 300-feet areas is about 2 miles long, is situated just 

 about the middle of the loch, and includes the maximum depth of 359 

 feet. The others, further to the east, are close together, and of very 

 slight extent. Though the wide portion of the loch, fully 9 miles in 

 length, forms a simple basin, there is not the well-marked U -section 

 found in typical glacier-formed lochs (see cross-section E-F on map). 



