Abstract
The Pre-Tertiary rock assemblages of Biga Peninsula are represented by the Kazdağı metamorphics of Paleozoic, Triassic Karakaya formation, Jurassic limestones and Upper Cretaceous ophiolitic melange. the tertiary rocks start with Middle Eocene andesitic lava and pyroclastics of Edincik volcanites and Beyçayır volcanics. These units overlie unconformably the basement rocks and they are overlain by Şahinli formation consisting dominantly of basalt, basalticandesite and its volcanoclastics. The Fıçıtepe formation unconformably overlies these units and is represented by the conglomerate, sandstone, and shale with intercalated thin coal seams of delta-plain and fluvial deposits. The reefal limestone of Soğucak formation overlies both Şahinli and Fıçıtepe formations with an unclear unconformity surface. From late Eocene onward, the region began to deepening and the turbiditic sediments of Ceylan formation deposited with coeval Dededağ volcanics. The Dededağ volcanics are subdivided into three members namely the Hacıbekirler member, Kazmalı tuff member, and Korudere ignimbrite member. The ignimbrites are the dominant rock type and crop out among Balıklıçeşme, Çan and Bayramiç towns ofÇanakkale province. The ignimbrites formed as submarine pyroclastic flows and do not indicate fiamme structure due to weak-welding. The ignimbrites are overlain by sandstone, claystone and reefal limestone of Upper EoceneBeybaşlı formation to the north of Beybaşlı village. The Upper Eocene (?) aged Erdağ volcanics immediately overlie Beybaşlı formation. The Eocene rocks of the Biga peninsula are overlain unconformably by the Oligocene and Miocene andesitic, basaltic, rhyolitic and dacitic volcanics, and locally by lacustrine sediments.
Note: This paper is published in Turkish edition of the Bull. Min.Res.Exp. Just abstract of this paper is translated and published in the foreign edition. If you want to reach the whole pdf of Turkish edition of this paper, The title is "BİGA YARIMADASINDA ORTA-ÜST EOSEN VOLKANİZMASI VE DENİZEL İGNİMBİRİTLER".