TÜRKİYE'NİN GÜNEYBATISINDAKİ (ORTA TOROSLAR) ALLOKTON GÜMÜŞLÜ BİRİMİNDE BULUNAN ALT JURA RADYOLERLERİ

Mesozoyik radyolerleri, yakın zamanlara kadar, biyostratigrafik etütlerde dikkate alınmamaktaydı. Söz konusu grubu oluşturan planktonik mikrofosillerin çok küçük ve evrensel olarak uzun bir zaman aralığında yaşamış olmaları, araştırmacılar tarafından biyostratigrafik etütlerde dikkate alınmamalarına yol açmıştır. Halen devam etmekte olan çalışmalar, radyolerlerin, Mesozoyikte hızlı bir evrim gösterdiklerine işaret etmektedir. Gerçekten de bazı cinsler ve türler kısa zaman aralığında yaşamış, özel ortam ve koşul aramamıştır. Günümüzde radyolarit çörtlerde bulunan numunelerin matriksten ayrılmasının mümkün olabilmesi nedeniyle radyolerler, stratigrafinin ve kompleks orojenik kuşaklardaki yapının yorumlanmasında çok önemli bir yer tutmaktadırlar (örneğin Oman'daki Şemail ofiyolitleri ve Hawasina kompleksi gibi). Bu yayında, Türkiye'deki Alt Jurada bulunan yeni onbir tür ve üç cinsle birlikte Kuzey Amerikandaki Jurada bulunan iki yeni türün tanımı yapılmaktadır.

Anahtar Kelimeler:

TÜRKİYE, ORTA TOROSLAR, ALLOKTON GÜMÜŞLÜ

LOWER JURASSIC RADIOLARIA FROM THE GÜMÜŞLÜ ALLOCHTON OF SOUTHWESTERN TURKEY (TAURIDES OCCIDENTALES)

Until recently Mesozoic Radiolaria were ignored in biostratigraphic investigations. This group of planktonic microfossils was neglected because most workers considered them to be too small and difficult to work with and to be universally long ranging. Investigations now in progress indicate that Radiolaria evolved very rapidly during Mesozoic times. In fact, many genera and species are short ranging, cosmopolitan, and quite distinctive. Because it is now possible to separate matrix-free specimens from radiolarian cherts. Radiolaria are rapidly becoming the most important group of fossils in interpreting the stratigraphy and in turn the structure of many complex orogenic belts (e.g., Semail Ophiolite and Hawasina Complex of Oman) throughout the world. In the present report eleven new species and three new genera are described from the Lover Jurassic of Turkey and two new species are described from the Jurassic of North America.

Keywords:

LOWER JURASSIC RADIOLARIA, THE GÜMÜŞLÜ, ALLOCHTON OF SOUTHWESTERN TURKEY,

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