Türkiye Jeoloji Bülteni

Petrography Microsedimentary of Turbiditic Limestones Seben (Bolu) Region

Abstract: The most important part of the Upper Cretaceous limestone sequence cropping out on the Seben town,has turbiditic character. The shallow sea carbonate clastics, which mixed with pelagic muds transported with turbidcurrents, resedimented on the abissal plain.Determined samples shows the existence of four different llmestones occurence in the region. 1) Nongraded Iimestone (inclucling lime ball), 2) Graded limestones, 3) Laminated lfmestones, 4) Pelagic limestones with volcanicpartlcules.Carbonate noncarbonate turbidites alternate in the one part of the laminated beds. Small scale sedimentarystructures are seen very widely in these beds. They are load casts, brush mark, volcaneous sands cross laminations.