File:Jelar-fault-breccia Velebit Dinarides Croatia.jpg

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English: Velebit breccia (“Jelar” breccia), Croatien Dinaric Alps, Velebit.
Geology: The carbonate breccia are chaotically fractured by strong tectonics of Middle Eocene to Middle Miocene age. They outcrop on the SW slope of the Velebit over a distance of more than 100km, also along the complete WE striking ‘Bakovac-graben’ and the Lika region. The broken zone is an essential feature of uvalas, distinguished from sinkholes by size and genesis. Uvalas are generated both by karstification and considerable faulting. Part of the breccia was diagenetically cemented by fine crystalline mass. Where not totally cemented, it is highly water permeable (karst).

Deutsch: Velebit breccia („Jelar“ Brekzien), Kroatische Dinariden, Velebit.

Geologie: Es sind chaotisch fragmentierte, karbonatische Verwerfungs-Brekzien starker Tektonik des Mittel-Eozäns bis Mittel-Miozäns.

Tektonik und Wasserlöslichkeit des Karbonatgesteins sind in den Dinariden sehr ausgeprägte Erscheinungen. Am Südwest-Hang des Velebit-Gebirges sind die Jelar-Brekzien über mehr als 100km aufgeschlossen, außerdem auch entlang dem 'Bakovac-Graben' und in der Lika-Region. Bei starker Tektonik bilden sich typischerweise Uvalas als Depressionsformen, die wesentlich größer als Dolinen sind. Sie sind nicht nur durch Verkarstung, sondern ebenso durch beträchtliche Bruchtektonik geprägt. Die Brekzien weisen teilweise diagenetische, kristalline Zementierung auf. Wenn (noch) nicht total zementiert (klüftig), sind die Brekzien hochgradig wasserdurchlässig (Karst).
Date September 2006; June 20th, 2014 (upload)
Source see author
Author Park Administration of National Park Northern Velebit
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(Reusing this file)		 Explicit permission by organisation’s email of May, 9th, 2014

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