نتایج جستجو برای: upper albian
تعداد نتایج: 205454 فیلتر نتایج به سال:
The Lower Cretaceous Tuxen (lower Hauterivian – upper Barremian) and Sola (upper Barremian Albian) Formations in the Danish Central Graben (North Sea) constitute one of oldest chalk successions recorded globally, but have received little attention with regards to sedimentary facies depositional processes. This study presents first comprehensive carbonate analysis succession, retrieved from seve...
در این مطالعه نانوفسیلهای آهکی برش نیمبلوک در شمال باختر قائن ارزیابی و بررسی شده است. برش نیمبلوک با ستبرای 164 متر شامل سنگ‌آهک، مارن و شیل است. در برش مورد مطالعه 76 گونه نانوفسیلی متعلق به 30 جنس از 15 خانواده شناسایی شد. بر پایه نانوفسیلهای شناسایی شده، بخشی از زیرزون CC7b و زیست‌زون CC8 و بخشی از زیست‌زون CC9 از زیست‌زون‌بندی Sissingh (1977) و زیرزون NC7Cو زیست‌زونهای NC9, NC8 و بخش...
In this research systematics and biostratigraphy of the Cretaceous deposits foraminifera in Kerch section, southwestern Qayen, in the eastern margin of the Lut Block, were studied in detail. This section with 260 meters thickness, mainly formed by gray to cream color marl and shale, marly limestone and limestone laid on a light-colored limestone bed at the base. Seventeen genera and twenty two ...
Angiosperms evolved rapidly in the late Mesozoic. Data from the genetic-based approach called ’molecular clock’ permit an evaluation of the radiation of flowering plants through geological time and of the possible influences of Mesozoic mass extinctions. A total of 261 divergence ages of angiosperm families are considered. The radiation of flowering plants peaked in the Albian, early Campanian,...
The Mahajanga Basin Project, initiated in 1993 and centered in Upper Cretaceous strata of northwestern Madagascar, has resulted in the discovery of some of the most complete, well-preserved, and significant specimens of Late Cretaceous vertebrate animals from the Southern Hemisphere and indeed the world. Among the most important finds are various specimens of crocodyliforms, non-avian dinosaurs...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید