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The Dinantian biostratigraphy of a deep borehold near Eyam, Derbyshire
Author(s) -
Strank Angela Ft E.
Publication year - 1985
Publication title -
geological journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 54
eISSN - 1099-1034
pISSN - 0072-1050
DOI - 10.1002/gj.3350200304
Subject(s) - tournaisian , geology , biostratigraphy , chronostratigraphy , paleontology , borehole , anhydrite , basement , archaeology , carboniferous , sedimentary rock , geography , gypsum , structural basin
Detailed micropalaeontological analysis of the Eyam Borehole is presented. Dinantian strata of Upper Tournaisian to ‘middle’ Brigantian age have been recognized lying unconformably on top of Ordovi‐cian (?Llanvirn) basement beds (Dunham 1973). The early Tournaisian and late Brigantian beds are missing probably due to non deposition and erosion respectively. Throughout the Dinantian a shallow shelf environment is represented by a thick series of anhydrites and dolomites in the Upper Tournaisian. The new name Middleton Dale Anhydrite Series is proposed for these lowest Dinantian beds. The chronostratigraphy erected is compared with that outlined for Eyam by Dunham (1973) and for the Woo Dale Borehole by Strank (in press).