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. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 266 PETER A. RONA. 60"N RONA Fig-. 1 — Distribution of Atlantic salt deposits. T: Tertiary period; K: Cretaceous period; J: Jurassic period; TR: Triassic period: M: Mississipean (Carboniferous) period; S: Silurian period; DSDP 139, 140, 144; Deep Sea Drilling Project sites 4. Thermal gradient measurements based on the high conductivity of salt relative to surrounding sediment. 5. Salinity and chlorinity gradient measure- ments of interstitial w
. Collected reprints / Atlantic Oceanographic and Meteorological Laboratories [and] Pacific Oceanographic Laboratories. Oceanography 266 PETER A. RONA. 60"N RONA Fig-. 1 — Distribution of Atlantic salt deposits. T: Tertiary period; K: Cretaceous period; J: Jurassic period; TR: Triassic period: M: Mississipean (Carboniferous) period; S: Silurian period; DSDP 139, 140, 144; Deep Sea Drilling Project sites 4. Thermal gradient measurements based on the high conductivity of salt relative to surrounding sediment. 5. Salinity and chlorinity gradient measure- ments of interstitial water in unconsolidated sediment over salt deposits based on the high solubility of certain salts, especially halite, in water. The measured salinity gradients are given in Table 1 in parts per thousand (ppt). Seismic, magnetic, and gravity measurements alone may be inadequate to unambiguously dis- tinguish diapirs of salt from diapirs of mud or igneous rock. Thermal gradient and salinity measurements used in conjunction with the other geophysical methods can distinguish salt diapirs from those of other materials. Salinity gradients in interstitial water of unconsolidated sediment have been effectively used by the Deep Sea Drilling Project to indicate the presence of both salt diapirs and strata beneath the seabed (Manheim et al., 1973). As a consequence of the solubility of halite and rapid rates of ionic diffusion, vertical salinity 389. 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 Atlantic Oceanographic and Meteorological Laboratories; Pacific Oceanographic Laboratories; United States. Environmental Science Services Administration. Research Laboratories; Environmental Research Laboratories (U. S. ). Washington, D. C. : U. S. Dept. of Commerce, Environmental Science Services Administration, Research La
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