THE NUSPLINGEN LITHOGRAPHIC LIMESTONE - A "FOSSIL LAGERSTAETTE" OF LATE KIMMERIDGIAN AGE FROM THE SWABIAN ALB (GERMANY)

A short overview is given on the actual excavations within a fossiliferous lithographic limestone site near Nusplingen (western Swabian Alb, SW Germany). In contrast to the better known Early Tithonian Solnhofen Lithographic Limestone, it is much richer in fossils and 0.5 my older (Late Kimmeridgian, Beckeri Zone, Ulmense Subzone). Many of the fossils exhibit an excellent preservation, sometimes even of the organic matter. More than 7.000 specimens have been recorded belonging to almost 300 taxa (plants, microfossils, invertebrates, ichnofossils, and vertebrates)

Das Bathonium im Klettgau (Mitteljura, Südwest-Deutschland)

Der „Hahn’sche Fossilhorizont“ an der Basis des oberen Abschnitts der Spatkalke des Klettgaus (Südwest-Deutschland) enthält eine kondensierte Ammonitenfauna aus der Convergens- und Macrescens-Subzone der Zigzag-Zone des Unter-Bathoniums. Im untersten Bereich dieses „Hahn’schen Fossilhorizonts“ finden sich jedoch – ergänzend zu dieser kondensierten Fauna aus dem Unter-Bathonium – auch noch aufgearbeitete, artlich nicht bestimmbare Ammoniten, die möglicherweise aus der Parkinsoni-Zone stammen. Die Parkinsoni-Zone reicht jedoch sicher bis direkt an den Übergangsbereich zwischen den Spatkalken und dem „Hahn’schen Fossilhorizont“. Einige für das Unter-Bathonium des Klettgaus neue Ammonitenarten sowie einige wichtige Nachweise für das Mittel- und Ober-Bathonium werden ier vorgestellt.The “Hahn’sche Fossilhorizont” at the base of the upper part of the “Spatkalke” beds in the Klettgau area (southwestern Gemany) yields a condensed ammonite fauna of the Convergens und Macrescens subzones of the Lower Bathonian Zigzag Zone. In the lowermost part of the “Hahn’scher Fossilhorizont” occur (in addition to this condensed fauna from the Lower Bathonian) reworked ammonites, which probably stem from the Parkinsoni Zone. The Parkinsoni Zone is confirmed up to the transition between the “Spatkalke” and the “Hahn’scher Fossilhorizont”. Several ammonite taxa that are new for the Lower Bathonian of the Klettgau area, as well as several taxa that are age-diagnostic of the Middle and Upper Bathonian are presented

Ferromagnetism and Canted Spin Phase in AlAs/GaMnAs Single Quantum Wells: Monte Carlo Simulation

The magnetic order resulting from a confinement-adapted Ruderman-Kittel-Kasuya-Yosida indirect exchange between magnetic moments in the metallic phase of a AlAs/Ga(1-x)Mn(x)As quantum well is studied by Monte Carlo simulation. This coupling mechanism involves magnetic moments and carriers (holes), both coming from the same Mn(2+) ions. It leads to a paramagnetic, a ferromagnetic, or a canted spin phase, depending on the carrier concentration, and on the magnetic layer width. It is shown that high transition temperatures may be obtained.Comment: 7 figure