44 



POST-TERTIARY ENTOMOSTRACA. 



A sample of the red Boulder Clay taken from a depth of fourteen feet consisted of 

 76 per cent, fine mud, 10 per cent, sand, 14 percent, gravel or small pebbles. 



A sample of the grey Boulder Clay taken from a depth of thirty feet consisted of 56 per 

 cent, fine mud, 9 per cent, sand, 35 per cent, small gravel. 



In the upper red Boulder Clay the West Highland rocks, entering into its composition, 

 constitute less than one third, while in the lower division of the grey Boulder Clay at the 

 depth of thirty feet they form more than half of the bulk. 



The bores made preparatory to the construction of the dock extended over a radius of 

 about 600 feet, and displayed many irregularities in the succession of the two distinctly 

 marked Boulder Clays. 



The following plan and journal of bores will illustrate the disturbed and varying 

 nature of the old Boulder Clay base of many shell-beds. 



Journal op Bores at Garvel Park. 



FT. IN. FT. 



No. 1. 



Soil : 1 



Light till 29 



30 



No. 2. 



Soil and sand 2 6 



Light till 38 G 



41 



No. 3. 



Soil ] 



Sand 2 



Sand and gravel 5 



Light till 32 



. 40 



No. 4. 



Soil 1 



Gravel 1 6 



Light till 5 6 



Red till 4 



Sandstone rock 3 



15 



No. 5 (in River). 



Sand 2 



Red till and stones 6 



Sandstone rock 1 



9 



IK. 



FT. IN. FT. IN. 



No. 6 (in River). 



Dark sand 3 



Light till 3 



Red till 11 



17 



No. 7 (in River). 



Dark sand and shells 3 6 



Light till 8 



Mud 1 6 



Red till 6 



19 



No. 8 (in River). 



Sand and shells 18 



Red till 2 



20 



No. 9 (in River). 



Light till 4 



Red till 15 



19 



No. 10 (in River). 



Sand and shells 7 6 



Light till 17 6 



25 



No. 1 1 (in River). 



Sand 9 



LighttiU 11 6 



20 6 



