Preliminary magnetostratigraphic results from the late Miocene Maragheh Formation, NW Iran

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Salminen , M J , Paknia , M , Kaakinen , A P , Mirzaie Ataabadi , M , Zaree , G , Orak , Z & Fortelius , H L M 2016 , ' Preliminary magnetostratigraphic results from the late Miocene Maragheh Formation, NW Iran ' , Palaeobiodiversity and Palaeoenvironments , vol. 96 , no. 3 , pp. 433–443 . https://doi.org/10.1007/s12549-016-0239-y

Title: Preliminary magnetostratigraphic results from the late Miocene Maragheh Formation, NW Iran
Author: Salminen, Marja Johanna; Paknia, Mohammad; Kaakinen, Anu Pauliina; Mirzaie Ataabadi, Majid; Zaree, Gholamreza; Orak, Zahra; Fortelius, Hannu Lennart Mikael
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Geosciences and Geography
University of Helsinki, Department of Geosciences and Geography
Date: 2016
Language: eng
Number of pages: 11
Belongs to series: Palaeobiodiversity and Palaeoenvironments
ISSN: 1867-1594
URI: http://hdl.handle.net/10138/234356
Abstract: Maragheh in northwestern of Iran is a world famous Miocene fossil-bearing area. The area has yielded classical late Miocene Turolian age fauna that has been collected and studied sporadically over the last 150 years. However, the precise correlation of these sediments to the Global Time Scale (GTS) has remained ambiguous. To address this, 115 levels along an approximately 27-m-thick interval were collected from the middle Maragheh Formation at Dareh Gorg (Gort Daresi) section. Characteristic remanent magnetization directions obtained by alternating field demagnetization produce a polarity pattern that is supported by thermal demagnetization on a set of sister specimens. Three polarity intervals were recognised, the middle part of the section at around 15-21 m showing reversed polarity, bounded by normal polarities above and below. Based on the palaeontological constraints and recent K-Ar age determinations from the Maragheh Fm, three correlations to the geomagnetic polarity time scale appear likely. According to these correlations, recently discovered hominoid locality is correlated to C3Br.1n, C4n.1n, or to C4n.2n. For a unique correlation, however, additional palaeomagnetic data is required from the upper and lower parts of the section.
Subject: 114 Physical sciences
1171 Geosciences
1181 Ecology, evolutionary biology
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