8 - l
. . . .
/
' .
.
.
.
.
.
.
.
.
7
'
~ff
.~
~"
Dolomitization
.o
0
-
J
Undersaturation
.....
-o.2
(8
-0.4
-0.6
-o.8
' ~,b
4b '
~o' 8'0 '60
Sea water (%)
Fig. 9.13. Graph of saturation curves for calcite and dolomite for various mixes of seawater and freshwater.
Dolomitization occurs where the percentage of seawater varies between 5 and 50%. (After Badiozamani,
1973.)
Fig. 9.14. Air photo of Ambergris Cay, Belize. Modern dolomite is forming in supratidal flat muds behind
the barrier reef. (Courtesy of E. Purdy.)