taphonomic implications of foraminiferal composition and abundance in intertidal mud flats, Colorado River Delta (Mexico)

摘要

The tidal mud flats of the Colorado River delta are located at the head of the Gulf of Californic. This region is chaacter- ized by exceptionally high nutrient concentrations which are able to sustain a high primary productivity. This study documents the taxo- nomic composition of formainiferal assemblages of this area and their preservation potential from te intertidal zone of the southwesternmost part of the delta plain, in surface and subsurface (down to 20cm deep) sediments sampled north of San Felipe.