FIGURE 1.1 Global distribution of drill holes and sampling sites from (a) DSDP, (b) ODP, and (c) IODP over four decades of scientific ocean drilling. Drill-hole symbols are greatly exaggerated in size. The depths of the drill holes also vary significantly, depending upon scientific objectives and technical and logistical considerations at each site. This is a Mollweide (equal area) projection with a color range of -9,000 to 9,000 m, with white marking the 0 m depth. SOURCE: IODP-USIO.
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1 Introduction to U.S. Scientific Ocean Drilling ."
Scientific Ocean Drilling: Accomplishments and Challenges . Washington, DC: The National Academies Press,
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