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Download Guidebook as .pdf (3.4 Mb) - Carolina Geological Society

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COQUINAS OF THE NEUSE FORMATIONfacies", Sand-silt-clay facies", and "Coquina facies." Theoutcrop on the north side of Snows Cut w<strong>as</strong> designated <strong>as</strong> areference section for their Neuse Formation. Du Bar and others(1974) proposed the name Soc<strong>as</strong>tee Formation for agroup of related strata near Myrtle Beach, South <strong>Carolina</strong>.They indicate that the Soc<strong>as</strong>tee is found within the Wilmington,North <strong>Carolina</strong> area but did not specify where. Thedescription of the Soc<strong>as</strong>tee is very similar to that of the stratareported here and to that of the Neuse Formation. It isbelieved here that the Soc<strong>as</strong>tee Formation is in synonymywith the Neuse Formation, differing only in the state inwhich each are found. The name Neuse Formation thereforeh<strong>as</strong> priority over the name Soc<strong>as</strong>tee Formation when beingapplied to North <strong>Carolina</strong> strata.Owens (1989) applied the name Wando Formation tothe sands at Snows Cut and Waccamaw Formation to thecoquina. Use of the term Wando is valid for the surficialunlithified sands which overlie the coquina; but applicationof the term Waccamaw to the coquina is wrong. The WaccamawFormation occurs at a depth of -10 meters (-35 feet)below mean sea level and below the coquina exposuresthroughout the area <strong>as</strong> indicated by drilling at Fort Fisher bythe U. S. Army Corps of Engineers (1982). Zarra (1991)referred to the coquina <strong>as</strong> the "Fort Fisher Coquina" butmade no attempt to formerly define the name. Dockal(1995b) applied the informal name "Cape Fear Coquina" anddivided it into three subdivisions or lithofacies of diageneticorigin; "shell h<strong>as</strong>h lithofacies", sandy limestone lithofacies",and "Kure sand." The later being equivalent to Wells (1944)use of the term "Kure Sand" and the other two being equivalentto his "Cape Fear Coquina." Dockal's incorporation ofthe "Kure sand" into the Cape Fear Coquina w<strong>as</strong> b<strong>as</strong>ed uponthe interpretation that it represented the insoluble residue leftafter the leaching of the carbonate shells and cements of thecoquina; a view also suggested by Fallaw and Wheeler(1969). It is recommended here that the name Cape FearCoquina be suppressed and that name Neuse Formation beapplied both to the coquin<strong>as</strong> <strong>as</strong> originally intended by Fallow11

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