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Trace fossils are presented alphabetically by the type of organism thought to have constructed the burrow, trail, trackway, or nest. Such trace fossils as adhesive meniscate burrows and U-shaped burrows are listed separately because of their distinct morphologies. Rhizolith and vertebrate traces are also included. Each section has a description; interpretation of the behavior of the tracemaker and significance of the structure(s); its geologic range; trophic classification; and environmental and climatic implications. The traces are illustrated with idealized line drawings as seen in outcrop and in core. Color photographs depict trace fossils in hand specimens, outcrop, and core from different geologic formations and ages. Many of these traces occur in paleosols, where differences in color between the trace fossils and surrounding matrix accentuate the trace fossil’s morphology. This format allows the user to determine what the trace fossil he or she is working with as well as what the paleoenvironmental and paleoclimatic settings were of the accompanying strata.

The last two pages in this section (pages 131–132) are summary sheets of the trace fossil and contain representative color photographs and line drawings of each trace fossil in the photoglossary. It is organized by the orientation of trace fossils in outcrop (or core), and the morphologic complexity of the traces. The summary sheets can also be referred to by the user to key a trace fossil morphology into a particular section in the photoglossary. This sheet also includes a list of abbreviations of continental trace fossils to be used when measuring

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