The Tremadocian Beds at Flagabro in South-Eastern Scania (Sweden)

Abstract

A drilling core from Flagabro offering a section through the entire Tremadocian of the locality is described. A report is added on the Ceratopyge Beds and the uppermost part of the Dictyonema Schales exposed at the rivulet cast of the Flagabro farmhouse. A section based on the core demonstrates that the Dictyonema Shales of the locality have a thickness of about 11 m. The four zones of Dictyonema f. sociale, D. f. flabelli-forme, Adelograptus hunnebergensis, and D. f. norvegicum are represented. In the lowermost part of the shales a small, isolated graptolite fauna has been encountered. It is dominated by D. f. desmograptoides Hahn, which subspecies is associated with D. f. parabola Bulman, known from the bottom beds of the zone of D. f. sociale at Oslo. A new subdivision, called the zone of Dictyonema f. desmograptoides, is introduced for these lowermost strata of the Dictyonema Shales at Flagabro. Supplementary information on the uppermost Tremadocian has been furnished by the beds exposed at the Flagabro rivulet. A section through the zone of Dictyonema f. norvegicum, the shale with Ceratiocaris? scanica, and the Ceratopyge Limestone is described.