Kröger, Björn; Ebbestad, Jan Ove R.; Högström, Anette; Frisk, Åsa M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2011-02-01)
The Hirnantian Glisstjärn Formation (Normalograptus persculptus graptolite Biozone) is a succession of limestones and shales onlapping the Katian Boda Limestone in the Siljan District, Sweden. It contains a conspicuous, up to several decimeter thick bed densely packed with bipolarly oriented, orthoconic cephalopod conchs that can reach lengths of more than 120 cm. Conch fragmentation, bioereosion ...