Pfauengrund (Weismain)
| Pfauengrund | ||
|---|---|---|
| location | Weismain , Lichtenfels District , Upper Franconia , Bavaria , Germany | |
| Mountains | Weismain-Alb , Northern Franconian Alb | |
| Geographical location | 50 ° 5 '39 " N , 11 ° 13' 7" E | |
|
||
| Type | Kerbtal | |
| rock | Dogger β to Malm γ | |
| height | 325 to 465 m above sea level NN | |
| length | 2.8 km | |
| climate | temperate, warm | |
| flora | Coniferous and mixed forests as well as open arable and pasture areas | |
| use | Mainly agricultural and forestry use | |
The Pfauengrund is a small, about 2.8 km long left side valley of the Weismain valley funnel in the Weismain Alb . It belongs entirely to the area of the city of Weismain in the Lichtenfels district in Bavaria . The valley is located in the northernmost part of the Franconian Alb and is traversed by a small stream. In the valley there are three single farms and a village with a total of 72 inhabitants. The three inhabited settlements are Herbstmühle , Krassacher Mühle and Krassach. The valley is mainly used for agriculture, but is also popular with hikers and lies entirely in the Franconian Switzerland-Veldenstein Forest Nature Park .
Geography and description
The Pfauengrund begins immediately west of Weismain and cuts at about 325 m above sea level. NN between Kröttenstein and Kordigast in the Franconian Alb . The village of Giechkröttendorf and the isolated settlement of Lochhaus are located in this open, eastern end . Initially, the valley runs in a north-westerly direction and turns in a south-westerly direction at Oberloch . At the upper end of the valley, before it has reached the height of the surrounding Franconian high plateau, is the Berghaus single farm . A field and hiking trail with several branches leads through the valley.
geology
Brown Jura
The valley cuts at the lower, eastern end to about 325 m above sea level. NN in the brown Jurassic rocks of the Dogger β. Except for the valley floor, which is filled with sediments, brown rock and soil colors prevail, mainly fine-grained light beige, yellow or brown sandstone or earth-sandstone mixtures, e.g. T. limonitisch with pitches .
The upper three Braunjura layers γ, δ and ε together form an approximately 15 m thick ornate clay layer , rising from 402 to 428 m above sea level. NN. It separates itself from the steep upper edge of the iron sandstone and the almost wall-like beginning of the White Jura as a gently rising, 50-100 m wide terrace-like slope. Due to the almost complete forest cover on this level, it does not stand out as clearly as in previous centuries, when there were mostly fields and meadows. The regalia is gray in color and contains numerous limestone fragments from the rock above. Due to the poor exposure conditions, a tripartite division of the layer can only be seen occasionally. The lower gamma layer, approximately two to three feet thick is from calcareous sandstone benches and sand lenses interspersed tone. The middle, two to four meters thick delta layer is formed from Eisenoolith limestone , which are relatively hard, tough limestone spheres with a brown bark and a bluish core. After frost blast , they are mostly only present as broken pieces. The remaining almost ten meters thick brown Jurassic ε layer emerges as a light gray, stiff, plastic, low-lime clay. In the unweathered state, underground, it has a semi-solid to solid consistency and is rich in fossils in layers. In all three layers there are particularly large brown irons - ooids that can be seen with the naked eye. The youngest Brown Jurassic layer ζ was not deposited in the entire Obermaing area or only in negligibly small remnants.
White Jura
The slopes of the upper, northwestern end of the valley and the uppermost slopes in the southeastern part of the valley consist of reefs of the White Jura . The lowest two White Jura levels α and β form a single floor of a good 25 meters in the Pfauengrund and in the entire Weismain area. Nevertheless, they consist of different rocks. The alpha formation, which is also called lower marl limestone there, consists mainly of marls . The beta formation consists of fine-grained, smooth-breaking limestone . It is rich in fossils such as ammonites , belemnites , thin-shelled shells and calcite crystals that arise in cavities. The common name for the layer Werkkalk but in the Upper Main region misleading because the country's banking limestones not frost resistant and therefore as work material are not suitable. On the slopes of the Pfauengrund, the alpha and beta levels are at an altitude of 410 to 465 m above sea level. NN. The iron layer silicate glauconite also occurs at the boundaries of the layer . Above the already flattening but easily separable beta level begins at 465 m above sea level. NN the 25–35 m thick layer of Weißjura γ, also known as Upper Marl Limestone . This clayey marl layer rises gently to moderately and serves as agricultural land in the area southeast of the two Kordigast peaks above the two individual settlements Berghaus and Oberloch. Occasionally there are larger limestone banks or lumpy limestone beds in the formation.
literature
- Günter Dippold (Ed.): Weismain - A Franconian city on the northern Jura 1 . Dechant Bau GmbH, Weismain 2011, ISBN 978-3-9814302-0-2
Web links
- Hiking trail on the Kordigast through the Pfauengrund , hinterinsel.de
Individual evidence
- ↑ a b c Topographic map of Bavaria - Pfauengrund near Weismain , geoportal.bayern.de, accessed on December 27, 2014
- ↑ a b c d Geological map of Bavaria 1: 25,000, map sheet 5933 Weismain, online: [ Archived copy ( memento of the original from December 28, 2014 in the Internet Archive ) Info: The archive link was automatically inserted and not yet checked. Please check the original and archive link according to the instructions and then remove this notice. ], bestellen.bayern.de, accessed on December 27, 2014
- ↑ a b c d e Dippold (2011), pp. 32–52
