94 research outputs found
Neue biostratigraphische Grundlagen zur Datierung des nordwestdeutschen höheren Malm
Die lithologische Abfolge des höheren Malm in Nordwestdeutschland wird mit Hilfe von biostratigraphisch aussagekrĂ€ftigen Ammonitenfunden datiert und mit der westfranzösischen Gliederung parallelisiert. Die Grenze zwischen der Mutabilis- und der Eudoxus-Zone liegt innerhalb der "Stollenbank". Der "Knollenkalk" mit dem "Yo-Lager" des "Mittel-Kimmeridqe" entspricht basalen Abschnitten der Caletanum-Subzone der Eudoxus-Zone. Die "Ballersteinbank" enthĂ€lt den "caletanum-Faunenhorizont", eine jĂŒngere Kalkbank innerhalb der "Virgula-BĂ€nke" den "quercynum-Faunenhorizont". Höchstes gesichertes marines Ober-Kimmeridgium (Autissiodorensis-Zone, Irius-Subzone) liegt in Gestalt der sogenannten "Gigas-Schichten" von Holzen/lth vor. An der Porta Westfalica kann hingegen eine SchichtlĂŒcke an der Basis der dortigen "Gigas-Schichten" , dem untertithonischen Gravesienkalk, weiter untermauert werden. Die jĂŒngsten mit Ammoniten datierbaren Jura-Schichten lassen sich in den "Gigas-Schichten" am SĂŒdrand des Deister nachweisen.The lithological sequence of the younger Upper Jurassie in NW Germany is dated with the help of ammonites and correlated with the sequence of W France. The boundary between the Mutabilis and the Eudoxus Zones lies within the "Stollenbank" member. The "Knollenkalk" member with the "Yo-Lager" above is a time equivalent of basal parts of the Caletanum Subzone (Eudoxus Zone). The "Ballersteinbank", a marker bed within the NW German Middle Kimmeridgian yields the caletanum faunal horizon. Another limestone bed above within the "VirgulabĂ€nke" Member represents the quercynum faunal horizon. Marine Late Kimmeridgian deposits (Autissiodorensis Zone, Irius Subzone) are recognized only in the surroundings of Holzen (lth mountains). In the Porta Westfalica section, however, there is no rock record of this age below the base of the Tithonian. The youngermost Jurassie beds with ammonites in NW Germany occur at the southern edge of the Deister hills
Field Trip D: The Nusplingen Plattenkalk and Other Fossil Sites in the Western Swabian Alb (SW Germany)
Macroacaena franconica n. sp. (Crustacea: Brachyura: Raninidae) from the Turonian of S Germany
The Giganteuston Member of Ăschingen (Humphriesianum Zone, Lower Bajocian, Swabian Alb), with comments on the genera Dorsetensia Buckman, 1892 and Nannina Buckman, 1927
Ein Profil in der Usseltal- und Rennertshofen-Formation der sĂŒdlichen Frankenalb (Unter-Tithonium)
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)
Ammonites and stratigraphy of a Lower Bajocian (Middle Jurassic) section in Sierra Chacaico (Neuquén Basin, Argentina)
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