Figure F2.
Major components of sediments from Demerara Rise in the system Al
2
O
3
x
5-SiO
2
-CaO
x
2 (relative weight ratios). Data point for average shale (AS) (Wedepohl, 1971) also shown for comparison.
A.
Unit I.
B.
Unit II–IV.
C.
Unit V.
