A fossil peat deposit from the Late Triassic (Carnian) of Zimbabwe with preserved cuticle of Pteridospermopsida and Ginkgoales, and its geological setting.
作者： Marion K. Bamford , Bernard Gomez , Timothy J. Broderick , Ann Cadman , Michael A. Raath
DOI:
关键词: Taphonomy 、 Peat 、 Flora 、 Paleontology 、 Sphenobaiera 、 Geology 、 Lepidopteris 、 Genus 、 Fauna 、 Dicroidium
摘要: Well-preserved cuticular material of Pteridospermopsida and Ginkgoales from the Late Triassic Zimbabwe is described here for first time. It preserved within a brown peat-like lens in Upper Karoo Angwa Sandstone Formation. The locality on Manyima River lower portion mid-Zambezi Valley Zimbabwe. Using SEM light microscopy to identify taxa, fragmentary cutiles are type have been assigned Lepidopteris sp. (Peltaspermales) Dicroidium A, B, (Corytospermales). Cuticles ginkgoalean leaf genus, Sphenobaiera, also described. ovules were found close association with cuticles, but as stomata not visible they cannot be any genus. Based their similarity flora South African Karoo, plants considered equivalent Molteno Formation age (Carnian). palynoflora supports this bracket, does fauna nearby. taphonomic process was one transport, sorting deposition fluvial system.
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