. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 18 (Tertiary g) sediments overlying 52 feet of basalt. In order to drill the Reef hole, a site was prepared about 80 yards inside the northern reef where the lagoon floor was eight feet deep at high tide. The drill and all the necessary equipment were positioned in a Navy barge, which was towed to the site and sunk (Fig. 17). The drill tower when raised was guyed to nearby coral heads and to the "Reef Hotel," an abandoned loran station on pilings in the lagoon. Drill crews and geologists had to be br
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 18 (Tertiary g) sediments overlying 52 feet of basalt. In order to drill the Reef hole, a site was prepared about 80 yards inside the northern reef where the lagoon floor was eight feet deep at high tide. The drill and all the necessary equipment were positioned in a Navy barge, which was towed to the site and sunk (Fig. 17). The drill tower when raised was guyed to nearby coral heads and to the "Reef Hotel," an abandoned loran station on pilings in the lagoon. Drill crews and geologists had to be brought by boat from Sand Island four miles away, a pleasant trip in good weather. In the Reef hole, 400 feet of post-Miocene limestone were penetrated, underlain by 75 feet of upper Miocene limestone and dolomite, followed by 370 feet of lower Miocene limestone and dolomite, 180 feet of marl, carbonaceous clay and volcanic clay, 40 feet of clay and conglomerate, and finally 393 feet (cored) of basalt. Freeing and floating the barge took almost three days, after which the nearly three-month- long program was ended. The drill rig and all equipment were left on the barge, which was towed to Pearl Harbor by a Navy ship, but was swamped in heavy seas and sank before getting home to port. Fortunately all boxes of cores had been shipped separately!. Figure 17. Drilling barge sunk in the lagoon of Midway Island, July, 1965. CARMARSEL EXPEDITION (1967). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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