A new early Ordovician Didymograptid, and its bearing on the correlation of the Skiddaw Group of England with the Tøyen Shale of Scandinavia

1991/07/01 by Jörg Maletz, J. Maletz, A. W. A. Rushton +2 · 4 citations
Earth and Planetary Sciences · #Paleontology and Stratigraphy of Fossils #Geological Studies and Exploration #Geological formations and processes

paper · doi:10.1017/s001675680001760x

Abstract

Abstract Didymograptus (s.l.) rigoletto sp.nov. is a distinctive species in the balticus group of didymograptids occurring in the Tøyen Shale (Lower Ordovician). In three localities in Sweden it has a short range near the top of the range of Tetragraptus phyllograptoides , and it occurs at about the same level at localities in the Oslo region, Norway; at most of these localities it occurs within the range of Tetragraptus of the approximatus group. Its presence in the Skiddaw Group of the English Lake District indicates the occurrence there of the basal Arenig ( sensu lato ), equivalent to the T. phyllograptoides Biozone of Scandinavia and the T. approximatus Biozone (= Lancefieldian 3) of the Australasian succession.

Cited by

• Lower Ordovician graptolites from Angosto del Moreno, Cordillera Oriental, Argentina
• GRAPTOLITES AS INDICATORS OF MAXIMUM FLOODING SURFACES IN MONOTONOUS DEEP-WATER SHELF SUCCESSIONS
• Graptolite-Trilobite Biostratigraphy in the Santa Victoria Area, Northwestern Argentina. A Key for Regional and Worldwide Correlation of the Lower Ordovician (Tremadocian—Floian)
• Reevaluación de las Biozonas deTetragraptus PhyllograptoidesyT. akzharensis(Ordovícico Inferior, Floiano) de la Cordillera Oriental Argentina

Related

• The Lerhamn drill core and its bearing for the graptolite biostratigraphy of the Ordovician Tøyen Shale in Scania, southern Sweden
• The sequence and correlation of Early Ordovician (Arenig) graptolite faunas in the Richardson Trough and Misty Creek Embayment, Yukon Territory and District of Mackenzie, Canada
• The first Early Ordovician graptolites and marine incursions in eastern Alborz, Iran
• The Ordovician graptolite sequence of Australasia
• Latitudinal and depth zonation of early Ordovician graptolites