نتایج جستجو برای: campanian
تعداد نتایج: 532 فیلتر نتایج به سال:
This study presents the results of examination cephalopod remains extracted from digestive tract 40 loggerhead turtles, Caretta caretta, stranded along Campanian coasts (Southern Italy, eastern Tyrrhenian Sea). We retrieved 23 cephalopods 16 turtles (frequency occurrence = 40%). They belonged to Sepia officinalis (19 specimens) and Octopus vulgaris (2 specimens), both them benthic neritic speci...
Five subsurface sections and a large number of thin the Hartha Formation (age Late Campanian – Early Maastrichtian) were studied to unravel depositional facies environments. The is important as an oil reservoir in Iraq. Petrographic microfacies analysis selected wells from Balad East Baghdad fields Central Iraq, enable recognition three main Sedimentary paleoenvironments. These are restricted m...
در این مطالعه نانوفسیلهای آهکی سازند گورپی در برش کلچنار در شمال باختر ایذه بررسی شده است. در این برش سازند گورپی از مارن، مارن شیلی و سنگآهک مارنی تشکیل شده است. به منظور معرفی گونه های شاخص، تجمعات فسیلی همراه و زیست زون ها، 150 نمونه اسلاید از سازند گورپی مطالعه شد که در نتیجه به تشخیص12 زیست زون انجامید. در این مطالعه 61 گونه و 35 جنس از نانوفسیل های آهکی شناسایی شد. بر پایه زیست زون های...
A calcareous nannofossils biostratigraphic study has been carried out on the chalky limestones located in South Gorgan, north of Iran. The study is aimed at determining the age and nannofossil biozonations of the well. The samples were prepared using smear slide technique. Thirty seven calcareous nannofossils species were identified and used to make biostratigraphic zonations and dating of the ...
Deposits spanning the Radotruncana calcarata Taxon Range Zone at the Postalm section, Northern Calcareous Alps (Austria) are examined quantitatively for foraminiferal assemblages, especially the planktonic group. This study focuses on establishing a high resolution record spanning an 800 ka long stratigraphic interval from the active continental margin of the Penninic Ocean. The Postalm section...
Crocodyliforms serve as important taphonomic agents, accumulating and modifying vertebrate remains. Previous discussions of Mesozoic crocodyliform feeding in terrestrial and riverine ecosystems have often focused on larger taxa and their interactions with equally large dinosaurian prey. However, recent evidence suggests that the impact of smaller crocodyliforms on their environments should not ...
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