Sedımentary features of tıdal deposıts of the upper cretaceous ın seben area (NE Bolu-Turkey)

Yıl 1984, Cilt: 101-102 Sayı: 101-102, 1 - 1, 01.06.1984

Baki Varol Nizamettin Kazancı

Öz

Shallow water sandstones are characterized by sand bars, tidal channel and lagoon sediments, which are approximately 400 m thick of Upper Cretaceous in Seben (Bolu) area. Massive bedding, very intensive flow-rolls, parallel and low-angle cross laminations show bar sediments to be deposited near-offshore environments with high available sediments. Tidal channel had dissected upper part of bar sediments interfingering into lagoon deposits. Large-scale tabular cross bedding, various size through-cross and flame laminations, common mud nodules, lag sediments, coquina lenses, biogen burrowing zone and rippled sand surfaces, such as certain sedimentary structures suggest that the channel had been cut and filled by tidal current regimes.

Anahtar Kelimeler

Upper Cretaceous, lagoon, sediment, tide

Kaynakça

• Altınlı, LE, 1973, Om Sakarya jeolojisi: Cumhuriyetin 50. Yılı Yerbilimleri Kong. Tebliğleri, 159-191, Ankara.
• , 1975, Paleosen yaşlı Kızılçay grubunun çökelme ortamları: İst. Univ. Fen. Fak. Mecm, seri B, 40/1-2, 233-240, İstanbul.
• Johnson, K.G. ve Friedman, G.M, 1969, The Tully clastic correlatives (Up. Devonian) of New York State; A model for recognition of alluvial, dune, tidal, nearshore (bar and lagoon) and offshore Sedimentary environments in a tectonic delta complcx: Jour. Sedim. Petrology, 39, 451-485.
• Kazancı, N.; Varol, B. ve Tunç, M, 1984, Seben (Bolu) bölgesi Üst Kretase karbonat ve volkanojenik fliş fasiyesleri: Jeoloji Mühendisliği Derg, 20, 61-76.
• Ludwick, J.C., 1970, Sand waves and tidal channels in the entrance to Chesapcakc Bay; Virginia: J. Science, 21, 178-184.
• Reineck, H.E. ve Singh, I.B, 1975, Depositional Sedimentary environments: Springer Verlag, New York-Berlin- Heidelberg, 439s.
• Saner, S, 1978, Orta Sakarya'daki Kretase-Paleosen-Eosen çökelme ilişkileri ve Anadolu'daki petrol aramalarında önemi: Türkiye 4. Petrol Kong. Bildirileri, 95-114, Ankara.
• Sorauf, I.E, 1965, FIow rolls of Upper Devonian rocks of South Central New York State: Jour. Sedim. Petrology, 35, 553-563.
• Swift, O.J.P, 1975, Tidal sand ridges and shoal-reueat massifs: Mar. Geol, 18, 105-134.