Fluvial Environments - Trace Fossils as Indicators of Sedimentary Environments - page 360

burrows, J-, Y-, or U-shaped vertical burrows, burrow systems), perhaps reflect-
ing a higher potential for better developed soils in this type of rivers.
ACKNOWLEDGMENTS
Dirk Knaust and Richard Bromley are thanked for the invitation to contribute to this volume.
The volume editors and Nigel Mountney make constructive reviews that improved the chap-
ter. Eduardo Bellosi kindly read critically a former version of this chapter. This research was
funded by grants PIP 8010164 from CONICET (Argentina) to R. N. M. and FONCYT-PICT
07/1972 of the ANPCYT (Argentina) to J. F. G.
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