Two extinct species of balanomorph barnacles are identified from the La Meseta Formation (Eocene) of Seymour Island, Antarctic Peninsula. The report of Austrobalanus macdonaldensis Buckeridge in subunits Telm 5 and 7 represents the first noted occurrence of the species outside of South Island, New Zealand, and the first record of the genus Austrobalanus Pilsbry outside of Australasia. The notice of Solidobalanus sp. in subunits Telm 2, 5, and 7 represents the earliest known occurrence of the genus in the Southern Hemisphere. Records of the genus from middle Eocene deposits in Western Europe and North America predate those from the La Meseta Formation. Each taxon is typically associated with subtidal and inner shelf faunal assemblages in moderate- to high-energy environments.

Abstract The Martin Marietta Aggregates Ideal Cement quarry at Castle Hayne is located approximately 2 miles west of the intersection of U. S. 117 and State Road 1002 on the north side of State Road 1002, in the Castle Hayne 7.5-minute quadrangle. The quarry exposes the Rocky Point Member of the Peedee Formation, and Sequences 1, 2, 3 and 4 of the Castle Hayne Limestone.

Abstract There have been numerous conflicting interpretations of the stratigraphy and age of the Castle Hayne Limestone since it was first formally described by Miller (1912). Recent interest in these Eocene carbonates was precipitated by nearly simultaneous, but very different stratigraphic revisions proposed by Baum et al. (1978c) and Ward et al. (1978) (Figure 1). Subsequent studies by Baum et al. (1979), Worsley and Turco (1979), Zullo and Baum (1979, 1980), Harris and Zullo (1980), Kier (1980), Ward and Blackwelder (1980), Baum (1981), Otte (1981), Jones (1983), Berggren and Aubry (1984), Hazel et al. (1984), Zullo (1984), and Harris et al. (1984) addressed more specific issues of paleontology, biostratigraphy, ehronostratigraphy, and petrology, and some were directed toward a substantiation of one of the 1978 stratigraphic revisions. Kier (1980) in his monograph of Eocene echinoids of the Carolinas, provided the first indication that neither of the 1978 stratigraphic revisions truly reflected the lithostratigraphic complexities encompassed by the varied carbonate facies grouped in the Castle Hayne Limestone. Kier established a sequence of three Informal assemblage zones (”early,” ”middle” and ”late”) that strongly suggested that the assignment of Eocene carbonates to either the scheme of Ward et al. (1978) or Baum et al. (1980) was in error. Although the significance of Kier’s new data was initially recognized by Baum et al. (1979), and is partially reflected in the correlation chart proposed by Harris and Zullo (1980), it has only been through the application of sequence-stratigraphic concepts to the Castle Hayne that a coherent stratigraphic

Abstract Westward expansion of the Fussell Ouarry (see Fig. 5 of Road Log for location) has exposed a dark-gray clay lens in Castle Hayne Limestone. The clay is composed mainly of smectite, and by currrently accepted usage (Grim and Guven, 1978) can be termed bentonlte. This paper reports a geochemical, mineralogical and petrographical study of the bentonite and demonstrates its derivation from volcanogenic sediment. Bentonite samples were studied by a variety of techniques, including: X-ray radiography; X-ray diffraction (XRD); scanning electron microscopy (SEM) with an energy dispersive X-ray analyzer (EDX); chemical analyses by X-ray fluorescence (XRF) and wet chemistry; and petrographic modal analyses of smear slides, thin sections and grain mounts.