. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. EOCENE MARINE SEDIMENTS IN THE SPERRGEBIET 17. Fig. 8. Photomicrograph of the upper Eocene mollusc calcirudite at Wanderfeld IV (Fig. 7). Groundmass is micrite and microspar; light grains are quartz; large elongate grains are mollusc fragments neomorphosed to pseudospar. gastropods, a nautiloid, cirripeds, a crab, corals, hydrozoans, fish teeth and Callianassa burrows are all present. Bivalves and gastropods are the most abundant fossils: Bohm (1926) named 9 new species in the former class and 13 in
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. EOCENE MARINE SEDIMENTS IN THE SPERRGEBIET 17. Fig. 8. Photomicrograph of the upper Eocene mollusc calcirudite at Wanderfeld IV (Fig. 7). Groundmass is micrite and microspar; light grains are quartz; large elongate grains are mollusc fragments neomorphosed to pseudospar. gastropods, a nautiloid, cirripeds, a crab, corals, hydrozoans, fish teeth and Callianassa burrows are all present. Bivalves and gastropods are the most abundant fossils: Bohm (1926) named 9 new species in the former class and 13 in the latter from this locality; fish teeth are also numerous and diverse: Bohm (1926) named 13 new species here. The abundance and diversity of the gastropod Turritella is especially striking. This genus fitters the ground (Fig. 9) in the area, and prompted Haughton (1930a) to coin the term 'Turritella-hQ&s' for the Tertiary outcrops. Microfossils Calcareous nannofossils Moderately to poorly preserved calcareous nannofossils (Figs lG-11) occur in the clayey siltstones. A fist of the species identified follows. The relative percentage of each species, based on specimen counts in smear sfides, is also fisted. (These species are all well known and their taxonomy is not controversial; therefore a systematic palaeontology section is not included.) /o Braarudosphaera bigelowi (Gran & Braarud) Deflandre .... 1 Braarudosphaera discula Bramlette & Riedel trace Chiasmolithus spp 1. 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 South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
