Age of Neuburg Formation (Bavaria, Federal Republic of Germany) and its correlation with the Subboreal Volgian and Mediterranean Tithonian
Jeletzky, J. A. ✝
Newsletters on Stratigraphy Volume 20 Number 3 (1989), p. 149 - 169
published: Mar 30, 1989
ArtNo. ESP026002003007, Price: 29.00 €
Only the topmost Bed 238 of the Neuburg Formation is a lower Upper Tithonian deposit (middle and upper microcanthum Zone). The basal Upper Tithonian (Simplisphinctes Zone) is faulted out. The rest of the Oberhausen Member (Beds 117-237) is an upper Lower Tithonian deposit (fallauxi to ponti/Burckhardticeras Zones). The Unterhausen Member (i.e. the Pseudolissoceras bavaricum Zone), except for its basal Bed 22, is a middle Lower Tithonian (= lower Middle Tithonian of some authors) deposit correlative with the semiforme/verruciferum Zone of the Mediterranean standard. The Zaraiskites scythicus Zone of Central Poland and Central Russia is roughly equivalent to the Beds 102-112 of the Unterhausen Member bearing Zaraiskites-like ammonites. Therefore, it is a middle Lower Tithonian deposit correlative with the upper semiforme/verruciferum Zone. The next older Ilowaiskya pseudoscythica Zone of these two Subboreal regions corresponds to the lower semiforme/verruciferum and upper darwini/albertinum Zones of the Mediterranean Province as well as to the Bed 22 and the upper Rennertshofen Beds of the Franconian Basin. Therefore, the Central Russian Virgatites virgatus and Epivirgatites nikitini Zones correspond to the upper Lower Tithonian fallauxi to ponti/Burckhardticeras Zones of the Mediterranean standard. The entire Portlandian Stage of England is a Lower Tithonian deposit. Isterites and Pseudovirgatites are exclusively mid to late Early Tithonian genera. The controversial Central European Pseudovirgatites scruposus Zone appears to be correlative with the upper semiforme/verruciferum and Zaraiskites scythicus Zones.