Lithogenous Sediments
81
Fig. 3.7. Heavy mineral provinces of the Gulf of Mexico, based on typical mineral associations .
I East Gulf; /I Mississippi; 11/ Central Texas; IV Rio Grande; V Mexico. Carbonate particles are
dominant off Mexico and Yucatan . The heavy mineral patterns contain clues about the sources and
transport paths of terrigenous sediments. [D. K. Davies , W. R. Moore, 1970, J. Sediment. Petrol. 40:
339]
Fig. 3.8. Recent hemipelagic sediment from Continental Rise off NW Africa (Cape Verde Rise).
SEM photos, hal' 20 /lm. Left Fine-silt fraction (2- 6 /lm) predominantly composed of coccoliths (c)
and of some detrital mica (m) and quartz (q); Rig ht coarse silt fraction, mainly detrital grains
(q quartz) and foraminifera tests and fragments (j). [Photo courtesy D. Fiitterer]
81
Fig. 3.7. Heavy mineral provinces of the Gulf of Mexico, based on typical mineral associations .
I East Gulf; /I Mississippi; 11/ Central Texas; IV Rio Grande; V Mexico. Carbonate particles are
dominant off Mexico and Yucatan . The heavy mineral patterns contain clues about the sources and
transport paths of terrigenous sediments. [D. K. Davies , W. R. Moore, 1970, J. Sediment. Petrol. 40:
339]
Fig. 3.8. Recent hemipelagic sediment from Continental Rise off NW Africa (Cape Verde Rise).
SEM photos, hal' 20 /lm. Left Fine-silt fraction (2- 6 /lm) predominantly composed of coccoliths (c)
and of some detrital mica (m) and quartz (q); Rig ht coarse silt fraction, mainly detrital grains
(q quartz) and foraminifera tests and fragments (j). [Photo courtesy D. Fiitterer]