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Studies on lower devonian petrifactions from Britain. 1. Pyritised axes of Hostinella from the brecon beacons quarry, Powys, South Wales

1980; Elsevier BV; Volume: 29; Linguagem: Inglês

10.1016/0034-6667(80)90058-5

1879-0615

Dianne Edwards,

Geology and Paleoclimatology Research

A new species, Hostinella heardii, is based on compression and petrifaction fossils from the Senni Beds of the Brecon Beacons, Powys, South Wales. Incident light and scanning electron microscopy (SEM) studies on the iron sulphite (pyrites) petrifactions have provided anatomical details of the xylem and outer cortical region; the former consisting of close-set annular tracheids. An analysis of the composition of individual cells provides some insight into the sequence of events occurring during the petrifaction process. The affinites of the sterile axes are discussed, particularly in relation to Krithodeophyton croftii Edwards also found at the locality.