SECT. 3] 



SHALLOW -WATER CARBONATE SEDIMENTS 



567 



□ <20% □60-60% 

 m 20-40*. ra >60''' 

 C3 40-60% 



^.-t^ 



yidero De 

 Botabano 



^-Zi 



* t CpENINSULA OE ZAPATA 



^^V^l '^: _::y^-^--->:. 



CI]Ab5trt □ 10-20% 



p?n 0- 10% n > 20% 



Per cent groins (per cent of sample > 0.062 mm) 



Coral and Coralline Algol groins, per cent of loloi sample 



CZ3'5% CD 10-20% 

 m 5- 10% E13 > 20% 



r~1 Absent [^ 40-60% 

 C3 0-20% E3 60-80% 

 C3 20-40% Ki>80% 



Foraminiferol grams, per cent of lotol sample 



fslonskeletol groins, per cent of total somple 



CZ3 Absent 113 20-30% 



C3o-io% CI3>3o% 



I I 10-20% 



~^-<?£ 



ci]<'o% nn 20-30% 



m 10-20% fZ3 > 30% 



Halimedo grams, per cent ot total sample 



Moltuscon groins, per cent of totol sample 



Fig. 8. Grain size and constituent composition in the Gulf of Batabano, Cuba. (After 

 Daetwyler and Kidwell, 1959.) 



the genera and species of mollusks and Foraminifera in the two types of occur- 

 rences. 



The preceding examples are from regions where there are large and obvious 

 differences in physical environment. In areas where the differences in physical 

 conditions are smaller, we can also find differences in the flora and fauna and 



