Karstified clasts in south Velebit Mt. moraines, Croatia - evidence of glaciation of karstified mountain range (CROSBI ID 574547)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa
Podaci o odgovornosti
Marjanac, Tihomir ; Tomša, Ana Merija ; Marjanac, Ljerka ; Hughes, Phil ; van Calsteren, Peter
engleski
Karstified clasts in south Velebit Mt. moraines, Croatia - evidence of glaciation of karstified mountain range
Middle Pleistocene moraines of Southern Velebit Mt. comprise karstified clasts which range from 0, 5 m up to more than 10 m in diameter. These are represented by lithologies which are common on the Velebit Mt. ; Upper Cretaceous limestones and Jelar-breccia of Paleogene-Neogene age. The moraines are several meters to several tens of meters thick and are composed of debris in grain contact, with interspaces locally filled with fine-grained matrix, and locally cemented by sparry calcite. The calcite cement is secondary infill of openwork moraine and was dated by U-Th series providing minimal age of 159.8 ka. The karstified clasts in these moraines are usually rotated and karren are abraded. Sometimes there are younger karren developed over the older forms, but both systems are today in a rotated position. Karstification of these clasts pre-dates formation of moraines which are attributed to the Riess glacial. These rillenkarren and rinnenkarren were possibly formed during the Mindel-Riess interglacial on nearby mountain tops, and were eroded and transported by glacial ice. Thus, recognition of karstified debris in moraines provides evidence of pre-middle Pleistocene karstification of the Dinaric Mountain range.
karst; karren; moraines; Pleistocene glaciation; Velebit Mt.; Dinarides
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Podaci o prilogu
52-52.
2011.
objavljeno
Podaci o matičnoj publikaciji
19th International Karstological school "Classical Karst". Karst Underground Protection. Postojna 20.-25.6.2011., Abstracts
Gostiničar, Petra ; Hauselmann, Philipp ; Prelovšek, Mitja ; Zupan Hajna, Nadja
Postojna: Karst Research Institute - ZRC SAZU
Podaci o skupu
19th International karstological school "Classical karst" - Karst underground protection
poster
20.07.2011-25.07.2011
Postojna, Slovenija