Erschienen: 19.03.2013 Abbildung von Schreiber | Die Kalksteine des Wildenfelser Zwischengebirges | 2013 | Petrographie, Stratigraphie un... | 159

Schreiber

Die Kalksteine des Wildenfelser Zwischengebirges

Petrographie, Stratigraphie und Chemismus

lieferbar, ca. 10 Tage

2013. Buch , Buch. 199 S. 5 s/w-Tabelle, 17 Statistiken, 5 Ganzseitenillustrationen s/w

E. Schweizerbart. ISBN 978-3-510-95970-9

Format (B x L): 17 x 25 cm

Gewicht: 800 g

Das Werk ist Teil der Reihe: Geologisches Jahrbuch Reihe A; 159

Produktbeschreibung

This paper reports for the first time in detail on the comprehensive stratigraphic, paleontological and chemical analysis of the very numerous and varied limestones and accompanying rocks of the Wildenfelser Zwischengebirge. Most of them are the most easterly occurrences in Germany. The Tentakulitenknollenkalk Formation of the Lower Devonian is present in two forms. The overlying Tentakulitenschiefer Formation only includes numerous, albeit thin, radiolarites at the Wildenfels locality. Previously little known or unknown limestones occur either side of the base, and particularly in the upper part of the basic extrusive series in the lower Upper Devonian. In the lower section they consist of dark, pyrite-rich clay slate with micritic, fossil-poor limestones. The upper section includes limestones with frequent shallow water fossils, as well as reef corals and frequent coarse-clastic sediments. There are also marker pebble beds consisting of black radiolarites with carbonate inclusions, previously only known from the Wildenfels area.

The mostly dark and relatively thick limestones with slates of the brachiopod limestone also include limestones in parts of the lowermost beds which contain shallow water fossils and largely reworked basic tuffs. The middle section contains a lot of S and Corg, whilst the uppermost part contains a large proportion of reworked rocks. The brachiopod limestones are primarily part of the Upper rhenana Zone (Upper Devonian I). The "Kellwasserkalk I" is intercalated within basic tuffites or spilites. The largely siliceous and sparitic limestones and slates of the "Kellwasserkalk II" were formed under even more extreme reducing conditions. The Kellwasser facies starts in the longuiformis Zone (at the upper boundary of the Upper Devonian I) and extends up into the Upper crepida Zone (lower Upper Devonian II).

The Knotenkalk mostly has a low to medium amount of slate and therefore has analogies with the NW margin of the Bergaer Anticline. Ist pelites have the lowest proportion at the base of the annulata Event and in the Schwarzburger Anticline. The intense green and red slates with thin limestone lenses overlying the Knotenkalk extend into the Lower (Middle?) praesulcata Zone near the upper boundary of the Upper Devonian, and include a 0.3 m thick rhyodacite tuff.

Corals and foraminifera do not occur until the Arundian (upper Lower to Middle Visean, V1b–V2 a) (WEYER 2001). The major part consists – with the exception of north-eastern Bavaria – of the thickest Carboniferous limestones of the Saxothuringikum zone. Oncoids and ooides occur here frequently in the uppermost horizons. The Arundian also includes "keratophyr tuffs" as well as dark slates with limestones in the lowermost and uppermost horizons.

Varying depositional environments were present in the Wildenfels area: the Thuringian facies, with analogies in part with the Bavarian formations in northeast Bavaria, as well as special regional variations.

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