نتایج جستجو برای: late campanian

تعداد نتایج: 195767  

Journal: :Geosciences 2022

Located in northern Peru, at the lowest segment of Central Andes, Bagua Basin contains a Campanian to Pleistocene sedimentary record that archives local paleoenvironmental and tectonic history. We present new ?18O ?13C signatures pedogenic carbonate nodules from paleosols Campanian–Maastrichtian Fundo El Triunfo Formation upper Eocene–middle Miocene Sambimera reconstruct isotopic composition pa...

ژورنال: علوم زمین 2017

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...

2015
Alexander Averianov Gareth Dyke Igor Danilov Pavel Skutschas

Five pterosaur localities are currently known from the Late Cretaceous in the northeastern Aral Sea region of Kazakhstan. Of these, one is Turonian-Coniacian in age, the Zhirkindek Formation (Tyulkili), and four are Santonian in age, all from the early Campanian Bostobe Formation (Baibishe, Akkurgan, Buroinak, and Shakh Shakh). All so far collected and identifiable Late Cretaceous pterosaur bon...

Journal: :رخساره های رسوبی 0
فرح جلیلی فاطمه هادوی مرضیه نطقی مقدم

for biostratigraphic studies, based on calcareous nannofossils, a thickness of 480 meters of cretaceous deposits in shushud section (north birjand) has been measured and sampled. the studied section is composed of shale, marl, marine sandstone and sandy limestone. the shale and marl units were more suitable for sampling. according to taxonomical studies, 10 genera and 25 species in shushud sect...

Journal: Geopersia 2013

This study presents the nannostratigraphy and nannofossil events in the lower boundary of Kalat Formation in the East and West of the Kopeh- Dagh basin. The Kalat Formation comprises of coarse grained detritus limestone with subordinate sandstone intercalations. In the current study, six sections have been chosen in the East and West of the basin which are as follow: Dobaradar section, Kalat se...

Journal: :Journal of Petroleum Exploration and Production Technology 2018

Journal: :Journal of South American Earth Sciences 2021

The hippuritid rudist bivalves from the Peters Hill Limestone, Jamaica, Barrettia coatesi (Chubb 1968) and Torreites tschoppi Mac Gillavry1937, are revised. B. is shown to be a primitive species of similar in development ruseae Chubb 1968 Clifton but more advanced that an undescribed sp. St Ann's Great River coral bed, Jamaica. T. likely represents youngest specimen this has been figured larger...

2012
ALEXANDER AVERIANOV GARETH J. DYKE

A dentary fragment containing the last two molars (m2-3) from the Late Cretaceous (Santonian-?Campanian) Bostobe Formation exposed at the locality of Shakh Shakh, northeast Aral Sea region, Kazakhstan, is attributed to a new taxon of Zhelestidae, Zhalmouzia bazhanovi, gen. et sp. nov. This specimen is only the second mammal described from Shakh Shakh, the unidentifiable eutherian Beleutinus orl...

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