. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 3. Large-diameter vertical burrows. Differential weathering of the less resistant burrow- fill and lining results in a bedding surface crowded with holes perpendicular to bedding. Scale = 5 cm. Interpretation These vertical burrows are broadly similar to Ophiomorpha but lack the typical dichotomous branching of that ichnogenus. If the openings were more distinctly funnel-shaped and the plugged tubes curved in vertical section, Mono- craterion might be a more plausible identification. The latter
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Fig. 3. Large-diameter vertical burrows. Differential weathering of the less resistant burrow- fill and lining results in a bedding surface crowded with holes perpendicular to bedding. Scale = 5 cm. Interpretation These vertical burrows are broadly similar to Ophiomorpha but lack the typical dichotomous branching of that ichnogenus. If the openings were more distinctly funnel-shaped and the plugged tubes curved in vertical section, Mono- craterion might be a more plausible identification. The latter has a stratigraphic. Fig. 4. Horizontal burrow with a dark pyrite-rich lining. Differential weathering of lining and fill results in excavation of the burrow (left).. 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
