First finding of Late Silurian conodonts from the 'Orthoceras Limestones', Camdag Area (NW Turkey): prelilninary constraints for the palaeogeography
| Autor: | Hüseyin Kozlu, Yakut Göncüoglu, Graciela Sarmiento, Mehmet Cemal Göncüoğlu |
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| Rok vydání: | 2002 |
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| Zdroj: | Geologica Balcanica. 32:3-12 |
| ISSN: | 2535-1060 0324-0894 |
| DOI: | 10.52321/geolbalc.32.1.3 |
| Popis: | The Paleozoic succession of the Camdag area is located between the Paleozoic rocks of the Istanbul and Zonguldak terranes in NW Turkey and has a key location for the paleogeographic position of these terranes. The Silurian deposits in this area includes from bottom to top: the Black Shale Member (gray to greenish gray, well cleaved shales with minor black siltstone and limy shale interlayers), the Shale-Limestone Member (black shales with limestone and dolomitic limestone interlayers), and the Shale-Si Itstone Member (alternation of black shales, light gray quartz-rich siltstones with few limestone lenses) that is concordantly followed by Lower Devonian deposits. The "Orthoceras Limestones" of the midc\le member yielded a poorly preserved conodont fauna indicating a Pridoli age. By this, the Paleozoic of the Camdag is considered to be the eastern continuation of the Istanbul Terrane. Moreover, this new finding of Late Silurian black shale - "Orthoceras Limestone" assemblage in NW Turkey, which is a wide spread paleogeographic marker in the Camic Alps and elsewhere in Europe may help to correlations with coeval and analogous facies of other paleobiogeographic areas in the peri-Gondwanan realm. |
| Databáze: | OpenAIRE |
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