384. = T. C. Chamberlin—Hillocks of angular Gravel 
A second sample of finer grain gave: 
Insoluble in HCL. 
iO, = 21°507 
Al,O, 2°480 
Fe,0, 409 
E MgO undetermined 
CaO “6 
24°396 
Soluble in HCl. 
CaCO, undetermined 
MgCo, & 
e,0, a 75°604 estimated by loss; sub- 
Al,O; % ject to correction for 
P.O 5 loss or gain. 
H,O é srs 
100°00 
Insoluble in HCl. Soluble in HCl. 
SiO, = 29°34] CaCO, = 31°079 
Al, O, 14°516 MgCO, 7°885 
‘Fe,O, 1°964 — 
CaO trace, undetermined 38°964 
Mg oe ““c 
45°821 
Fe,O, undetermined : 
. 15°215 subject to correction 
e . for loss or gain. 
Al,O, 3 
100°00 
This shows a much less, but still large proportion of lime- 
stone derivatives and a much greater ingredient of a clayey oF 
shaley character. ye 
The clays, associated with some portions of the gravel Ve 
