نتایج جستجو برای: biozone

تعداد نتایج: 108  

Journal: :Zootaxa 2014
Didier Merle Jean-Michel Pacaud Grégoire Métais Annachiara Bartolini Rafiq A Lashari Imdad A Brohi Sarfraz H Solangi Laurent Marivaux Jean-Loup Welcomme

The paleobiodiversity of the Volutidae (Mollusca: Gastropoda) of the Ranikot Group (Sindh, Pakistan) and particularly of the Lakhra Formation (SBZ 5 biozone, Earliest Eocene), is reconsidered on the basis of new material collected during recent field trips. Ten new species are described (Mitreola brohii sp. nov., Lyrischapa vredenburgi sp. nov., L. brevispira sp. nov., Athleta (Volutopupa) cith...

ژورنال: علوم زمین 2009
بهاءالدین حمدی پروانه رضایی روزبهانی

      رخنمون‌هایی از نهشـته‌های کرتـاسه در منـطقه هفتادقله در25 کیلومتری خاور اراک برونزد داردکه به منظور بررسی‌های سنـگ‌چینه‌ای و زیـسـت‌چینـه‌ای آن،  3 برش زمین‌شناسی مناسب از آن انتخاب و بررسی شد : یکی در شمال خاور، یکی در جنوب خاور و دیگری در مرکزمنطقه. مطالعات دقیق چینه‌شناسی و فسیل‌شناسی به عمل آمده برروی نهشته‌های کرتاسه منطقه مورد مطالعه نشان داد که این نهشته‌ها برخلاف نظر عده‌ای از زمی...

Journal: Journal of Tethys 2017

The litho-and biostratigraphy of Upper Cretaceous (Gurpi Formation) has been investigated within a well-exposed section at the northern limb of Pey zard anticline, Abnow area, Southern Iran. The studied section consists mainly of grey marl, calcareous pyritic shale, and argillaceous limestones. The Formation unconformably overlies Sarvak Formation and the Tarbur Formation overlies it unconforma...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده علوم 1387

چکیده ندارد.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشکده علوم پایه 1388

چکیده ندارد.

2014
Ellen Thomas Laia Alegret Eustoquio Molina

We studied Upper Cretaceous and Lower Paleogene benthic foraminifera from the Agost section (southeastern Spain) to infer paleobathymetrical changes and paleoenvironmental turnover across the Cretaceous/Paleogene (K/P) transition. Benthic foraminifera indicate uppermost bathyal depths at Agost during the Abathomphalus mayaroensis Biochron (from about 400 kyr before the K/P boundary) through the...

2003
Laia Alegret Eustoquio Molina Ellen Thomas

We studied Upper Cretaceous and Lower Paleogene benthic foraminifera from the Agost section (southeastern Spain) to infer paleobathymetrical changes and paleoenvironmental turnover across the Cretaceous/Paleogene (K/P) transition. Benthic foraminifera indicate uppermost bathyal depths at Agost during the Abathomphalus mayaroensis Biochron (from about 400 kyr before the K/P boundary) through the...

2015
Emma H. M. Arvestål Michael Streng

Postprint This is the accepted version of a paper published in GFF. This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination. Access to the published version may require subscription. 1 The late Llandovery graptolite fauna of the Retiolites Shales on Kinnekulle Mountain in the province of Västergötland has long been known but never illus...

2017
David K. Wright

There is great uncertainty over the timing and magnitude of the termination of the African Humid Period (AHP). Spanning from the early to middle Holocene, the AHP was a period of enhanced moisture over most of northern and eastern Africa. However, beginning 8000 years ago the moisture balance shifted due to changing orbital precession and vegetation feedbacks. Some proxy records indicate a rapi...

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