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Geocache Sconosciuta
Der Große Pfahl bei Viechtach

 This is an "Earthcache" You have to take a picture to log!

di wallace&gromit     Germania > Bayern > Regen

N 49° 05.003' E 012° 51.653' (WGS84)

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 Dimensioni: nessun contenitore
Stato: disponibile
 Nascosta il: 20. ottobre 2005
 Pubblicata dal: 20. ottobre 2005
 Ultimo aggiornamento: 20. ottobre 2005
 Listing: https://opencaching.de/OC038A

34 trovata
0 non trovata
0 Note
3 Osservata
2 Ignorata
782 Pagina visite
29 Log immagini
Storia Geoketry
2 Raccomandazioni

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Descrizione    Deutsch  ·  English (Inglese)

The "Pfahl" is a quartz filled crack in the earth´s crust, which extends over a distance of 150km from the "Oberpfalz" in Germany to "Upper Austria". Near Viechtach in the Bavarian Forest, it appears quite impressive.
The coordinates 49° 4.826' N 12°51.925' E lead you to a parking lot directly at the Bundesstraße 8. From there you can start a short walk around the "Devil´s Wall"
How did the Pfahl arise?
The Pfahl arose from a tectonic crack. 275 millon years ago the Forward Bavarian Forest was lifted a few hundred meters over the Inner Bavarian Forest, which caused this crack in the earth´s crust. It was filled with quartz which was dissolved from the surrounding rocks by hot water. All this happened in a depth up to 6 km.
How did the Pfahl get visible?
Over many million years the softer minerals which surrounded the Pfahl were removed by erosion. Due to its harder mineral the Pfahl itself could resist the erosion much better and is visible at many places since then.
What does the Pfahl consist of?
The Pfahl predominantly consists of the white to light-grey coloured Pfahlquartz. Pfahlquarz is composed of 95-98% silicic acid (SiO2) and small amounts of kaolinite and sericite.
What was Pfahlquartz used for?
Pfahlquartz was mainly used to make road gravel. But there are also some high purity quartzes which can be used for glass making and semiconductor production (silicon).
To log this cache you have to take a picture of you and your GPSr in front of the Pfahl.

Utilità

Questa geocache probabilmente è situata in una riserva naturale (Info): FFH-Gebiet Pfahl (Informazioni), Naturpark Bayerischer Wald (Informazioni)

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Log per Der Große Pfahl bei Viechtach    trovata 34x non trovata 0x Nota 0x

trovata 10. settembre 2020, 17:53 DadVader ha trovato la geocache

Ein kurzer Ausflug führte uns heute wieder mal in den Bayerischen Wald und da wir dabei meistens am Großen Pfahl bei Viechtach vorbei fahren, wurde es Zeit für eine kleine Wanderung um den Pfahl.

Danke fürs Herführen sagt DadVader

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Immagini per questo log:
Großer Pfahl bei ViechtachGroßer Pfahl bei Viechtach
Großer Pfahl bei ViechtachGroßer Pfahl bei Viechtach

trovata 13. giugno 2019, 09:51 Sonnenhut ha trovato la geocache

Unbedingt empfehlenswert! Mit der naturhistorischen Gesellschaft Nürnberg eine Exkursion zum Pfahl unternommen mit einer Führung eines Landschaftspflegers des Naturparkes bay. Wald! Jeder war begeistert! Besonderen Dank!

Immagini per questo log:
Am DrachenfelsenAm Drachenfelsen

trovata 11. ottobre 2015 BESTPOE ha trovato la geocache

Sauerstoff und Silizium sind die Element, die am meisten auf der Erde vorkommen. Hier hat sich Quarz in eine Tolle Landschaft gebettet. Die Fragen konnten wir beantworten. Wir bedanken uns, dass dieser Cache auch unter OC zu finden ist.

Immagini per questo log:
am Großen Pfahlam Großen Pfahl

trovata 19. agosto 2014 Zwiebel123 ha trovato la geocache

Der Cache war gut versteckt, aber nach einer Weile hat meine Schweser ihn dann doch gefunden. Lächelnd

Vielen dank für das Verstecken des Caches und weitern Suchern viel Glück.

trovata 20. maggio 2013 Z-Yago ha trovato la geocache

Ich finde es toll dass der Cache auch auf OC Eingestellt ist, aber nochmal den selben log Schreiben wäre blöd.

DFDC!