Kuşağı sınırındaki, Tokat ilinin kuzeybatısında yer alan inceleme alanındaki stratigrafik birimler incelendiğinde tüm Pontid Tektonik Kuşağında olduğu gibi bir temel örtü ayırdımının varlığı saptanmıştır. Temel kayaçları üzerinde uyumsuzlukla yer alan örtü kayaçlarından özellikle çeşitlilik ve fosil içeriği bakımından oldukça ilgi çekici olan Üst Mesozoyik yaşlı örtü birimlerine detay yaş verilerek yöre stratigrafisi kurgulanmış ve çalışma alanının, jeolojik ve stratigrafik konumuna yönelik bulgular saptanmıştır.
The study area covers an area of approximately 600km 2 in the Gerede district of the Province of Bolu, which is located in 1/25.000 scale G28 a1 a2 a3 a4 topographical sheets showing northwest of Turkey. This study tried to reveal the general geology of the study region, which is bound by the Mengen district on the north and Gerede district on the southeast. The study area includes various rocks with similar lithology and stratigraphic sequence with ages ranging from the Paleozoic to Quaternary period. Although the base complex, which constitutes the oldest, rocks of the region, cannot be observed in the mapped geographical area in Gerede, though it's known to exist at the base. The limestones developed on the tithonic facies of Late Jurassic-Early Cretaceous age on the base complex of Permo-Triassic period are incompatible. It is determined that the Upper Jurassic-Lower Cretaceous aged limestones are rich in titonic facies and rich in calpionel contents. As a result of detailed paleontological and biostratigraphic studies on the samples; 3
The Permo-Triassic basement rocks form the basis of the study area, which is located on the North Anatolian Fault and immediate vicinity of the Erbaa District on the north. The primary covering units overlying the basement rocks consist of a thick deposit, deposited in the depression in front of the Eurasian continent during the Liassic-Upper Eocene time interval. The first cover units, unconformably overlying the basic rocks, are overlaid by conglomerate, sandstone, mudstone, marl and oolitic limestones and Lower-Middle Jurassic rocks composed of volcano-clastic rocks, Upper Jurassic-Lower Cretaceous aged neritic and pelagic clayey limestones, the Santonian-Campanian aged sedimentary rocks in the pyroclastic character accompanied by the volcanicvolcanosedimentary rocks formed by the submarine volcanic activity in the Upper Cenomanian, Maestrichtian-Paleocene sandy limestones, Lower-Middle Eocene conglomerate, volcanogenic sandstone, sandy limestone and nummulites limestones and Upper Eocene basalt, pillow lavas, andesite, tuff, tuffite, aglomera, sandstone and siltstone intercalation unconformably. Secondary cover units, composed of loosely adhered conglomerates and sandstones that collapse during terrestrial atmospheric conditions in depressions formed along the North Anatolian Fault zone, are covered by the Quaternary aged alluvium, slope rubble and deposit cones, which constitute the youngest units of the study area.
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