0000000000297009
AUTHOR
Kirsten I. Grimm
Spiroplectinella Kisel’man 1972 (Foraminifera) aus dem Rupelium (Oligozän) des Mainzer Beckens
Die Wandstrukturen der bislang zur GattungSpiroplectammina Cushman 1927 gestellten Foraminiferen-Arten aus dem Rupelium des Mainzer Beckens wurden naher untersucht. Da Pseudoporen in der Wandung vorhanden sind, gehoren die Arten zur GattungSpiroplectinella Kisel’man 1972. Diese Gattung ist weder in die Uberfamilie der Spiroplectamminacea noch in die der Textulariacea einzuordnen, sondern, wie von Hottinger et al. (1990) vorgeschlagen, von beiden abzutrennen.
Foraminiferal zonation of early Oligocene deposits (Selztal Group, Latdorfian, Rupelian) in the Mainz Basin, Germany
Abstract. The foraminiferal zonation reported here is valid for the marine Oligocene deposits in the Mainz Basin. Thirteen zones and one subzone are defined in the basin facies, which may be correlated biostratigraphically with the current nannoplankton zones and also lithostratigraphically. The zonation for the beach facies, already described by the present author, is incorporated into the scheme. It is possible, therefore, to generate a high resolution foraminiferal biostratigraphical subdivision of the marine Oligocene deposits of the Mainz Basin.
Sedimentologie und Biostratigraphie im Rupelium der Ziegeleigrube Jungk, Wöllstein (Mainzer Becken)
In der Ziegeleigrube Jungk in Wollstein wurde ein Profil aus der Bodenheim- und der Stadecken-Formation (Oligozan, Rupelium) sedimentologisch und biostratigraphisch mit Hilfe von Foraminiferen, Dinozysten und kalkigem Nannoplankton untersucht. In dem Profil ist eine Coarsening-upward bzw. Shallowing-upward Sequenz erkennbar, die mit pelitischen Ablagerungen unter der Wellenbasis beginnt und mit flachmarinen siltig-sandigen Ablagerungen endet. Okologische Aussagen sind nur eingeschrankt moglich. Die Diversitat der autochthonen Fauna und Flora ist gering und zeugt von ungunstigen Lebensbedingungen. Wahrend der Ablagerungszeit der Rosenberg-Subformation herrschten vollmarine Bedingungen bei ei…
MAINZ: Paleontological Collections of the University of Mainz (Geoscientific Collections)
The paleontological collections of the Institute of Geosciences, University of Mainz, have been established in 1946/47. Today, they contain more than 33,000 specimens ranging from vertebrate fossils and recent osteological material to invertebrates as well as fossils from some well-known sites. The material is used for research as well as documentation and teaching.
10. Holocene and Eemian varve types of Eifel maar lake sediments
Abstract Varves of the Holocene and of the last interglacial were investigated in two sediment sequences from Eifel maar lakes. The modern maar with Schalkenmehrener Maar Lake and the dry maar lake West Hoher List have the same size, are two kilometres apart at the same altitude, but the Eemian lake was much deeper. The sediments of both lakes are dominated by autochthonous sediments, mainly from diatom-dominated algae. Differences in the palaeoproductivity and in calcite precipitation are probably not climatically controlled but due to lake basin morphometry and the carbonate reservoir in the catchment areas. The occurrence of dry periods with aeolian dust deposition during the last interg…