ACKNOWLEDGMENTS

This research was funded by a JOI-USSSP postcruise research grant. Lauren Hassler provided valuable laboratory assistance in processing samples for IRD MAR determination. Yohan Guyodo and Gary Acton skillfully collected the U-channel samples that were X-radiographed. Eugene Domack (Hamilton College) graciously loaned his portable X-ray machine for this project. Thanks to Fiona Taylor who provided valuable tips about its operation. Assistance in taking and processing the X-radiographs at Appalachian State University came from Keith Seramur, Marjorie McKinney, and Anthony Love. The manuscript was improved by critical reviews by Drs. D. Warnke and J. Smellie.

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