[b]Life span and growth rate of Middle Jurassic mesohibolitid belemnites deduced from rostrum microincrements[/b]

The microincrements of nine Middle Jurassic mesohibolitid belemnite rostra ([i]Hibolithes jurensis[/i], [i]Pachybelemnopsis fusiformis[/i] and [i]Pachybelemnopsis [/i]“[i]subhastatus[/i]”) were analysed to measure the on...

Xenosphinctes n. gen. (Ataxioceratidae, Lithacoceratinae), a new rare ammonite genus from the Lower Tithonian (Hybonotum Zone) of SW Germany

The new monotypic ammonite genus Xenosphinctes (type species: Xenosphinctes berkai n. sp.) is established. It is recorded from the Upper Jurassic, Early Tithonian, Hybonotum Zone, Riedense Subzone, eigeltingense α horizo...

Fluvial architecture element analysis of the Brushy Basin Member, Morrison Formation, western Colorado, USA

The 85-m Brushy Basin Member of the Morrison Formation in western Colorado, USA, comprises dinosaur-bearing sandstones (architectural element CHR and CH), crevasse-splay deposits and minor levee deposits (architectural e...

Deformations of trace fossils versus compaction in micritic limestones, an example from Korzkiew, Upper Jurassic (Kraków Upland)

Upper Jurassic (Oxfordian, Bimmammatum Zone) micritic limestones show presence of omissionsurface of firmground character with trace fossils assemblage. Deformations of burrows are used to quantitative determination of m...

Żyły klastyczne w środkowojurajskich iłach rudonośnych – przejaw późnojurajskiej aktywności tektonicznej