Named as member of Castle Hayne Formation. Named for Comfort, Jones Co., southeastern NC. Best exposures are at N.C. Lime Excavating Co. quarry at Comfort (type locality), and in other quarries located in Duplin, Pender, and New Hanover Cos. Consists of gray to cream-colored, bryozoan-echinoid-bearing calcirudite, grading to fine calcarenite, containing small admixture of fine quartz, detrital and authigenic glauconite, and some detrital phosphate, all representative of various depositional cycles. Generally soft and friable, but locally may be cemented by dense micrite matrix. Thickness ranges from approximately 3 m at Maple Hill and Castle Hayne to at least 10 m at Rose Hill, Magnolia, and Comfort; probably accounts for half of 260 m Eocene section reported by Brown and others (1972) for Core Sound, NC, area. Unconformably overlies New Hanover Member in southern part of basin as seen in quarries; below Goldsboro, on Neuse River and on Moseley Creek, and in northeast area of basin, overlies Beaufort Formation; in eastern counties, overlies lower Eocene carbonate rocks and is a sandy facies to the west. Overlain by Spring Garden Member (new) of Castle Hayne from Rock Landing to New Bern at Trent River; elsewhere overlain by Duplin or River Bend Formation. Age is late middle Eocene (Claibornian), based on fossils PECTEN MEMBRANOSUS, P. CLARKEANUS, and CRASSATELLA ALTA Conrad, all of Claibornian age and found in equivalent formations elsewhere.

Source: GNU records (USGS DDS-6; Reston GNULEX).