Abstract
Abstract Lycopsid megaspores processed from petrologically defined samples of the Low Barnsley Seam, Westphalian B, Upper Carboniferous have vertical distributions arranged in repeated successions of phases. A total of six phases was distinguished producing a more detailed pattern of succession than has previously been identified using miospores. Two important phases were recognized for the first time, designated: Phase 0, characterized by the species Cystosporites verrucosus Dijkstra, Lagenicula horrida Zerndt, Pseudovalvisisporites nigrozonalis (Stach & Zerndt) Lachkar and Cystosporites giganteus (Zerndt) Schopf, interpreted as a colonizing assemblage, and Phase 2, characterized by the species Triangulatisporites tertius Potonié & Kremp and Valvisisporites auritus (Zerndt) Potonié & Kremp which is considered to represent an association of non-arborescent lycopods. Phases are broadly related to petrographic type(s) but changes in phases and petrography are not necessarily coincident. Phasal changes of the kind described are believed to result from the formation of a raised bog.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
