The authors wish to acknowledge the contribution of Olivier Voutay and especially Mohamed Ramadan (presently at Techsia Company, Montpellier-France), who helped us write the software Statilog used for this study. We also wish to thank D. Barthes for the use of the wavelet transform code he developed and for his advice. We also thank the reviewers and G. Acton for their comments and invaluable suggestions.
This research used samples and/or data provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc.