Occurrence of dendritic agate from Dereyalak village (Eskisehir) - NW of Turkey and its relationship to sepiolite nodules in the region

Çalık, AYTEN; Arzogullari, Ugur

doi:10.1016/j.jafrearsci.2014.04.028

Occurrence of dendritic agate from Dereyalak village (Eskisehir) - NW of Turkey and its relationship to sepiolite nodules in the region

Copy For Citation

Çalık A., Arzogullari U.

JOURNAL OF AFRICAN EARTH SCIENCES, vol.97, pp.99-108, 2014 (SCI-Expanded)

Publication Type: Article / Article
Volume: 97
Publication Date: 2014
Doi Number: 10.1016/j.jafrearsci.2014.04.028
Journal Name: JOURNAL OF AFRICAN EARTH SCIENCES
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Page Numbers: pp.99-108
Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

This study presents the geology and mineralogy of the agate nodules that occur in the Pliocene polymictic conglomerates, northwest of Dereyalak village, Eskisehir, northwest Turkey, and their relationship to sepiolite nodules. The host-rock of the agates is a layer 5-25 m thick with an outcrop length of more than 1.5 km. This host rock consists of well-rounded pebbles, mainly composed of opal, ultramafics, sandstones, limestones and volcanics. The conglomerates unconformable overlie an Upper Cretaceous ophiolite complex. This tectonic contact, which trends E-W, is accompanied by another NE-SW-trending major fault. Most of the agate nodules are present along these fault zones.