Abstract
Synopsis Basal Wenlock shelly biofacies from the Knockgardner Formation (middle Straiton Group) of the Girvan district are dominated by brachiopods and trilobites assigned, respectively, to the Howellella–Protochonetes and the Podowrinella faunas. The Podowrinella fauna is consistently developed across the Midland Valley in Llandovery–Wenlock boundary rocks but the association is not known outside Scotland. In contrast the Howellella–Protochonetes fauna is more variably developed and restricted to the western part of the Midland Valley; but the components of this type of fauna occur in Wenlock and Ludlow rocks elsewhere. In Scotland both associations occur in nearshore, commonly storm-dominated sediments. The contrasting distributional patterns of the mobile and sessile benthos may reflect the differing life strategies of both the larval and adult stages in each group. Lithofacies within the upper Llandovery–lower Wenlock Straiton Group are revised within the regressive framework of the region.
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.
