نتایج جستجو برای: cenomanian
تعداد نتایج: 614 فیلتر نتایج به سال:
Paleoepidemiology (the study of disease and trauma in prehistoric populations) provides insight into the distribution of disease and can have implications for interpreting behavior in extinct organisms. A monospecific bonebed of the giant carcharodontosaurid Mapusaurus (minimum number of individuals = 9) from the Cañadón del Gato site, Neuquén Province, Argentina (Cenomanian) provides a rare op...
A noteworthy diversity of Dipnoi tooth plates has been collected in the fossiliferous conglomerates of the Alcântara Formation, early Cenomanian (Cretaceous) of Brazil. This sequence was deposited under transitional (estuarine) conditions, gathering reworked dissociated fossils represented by plants, fishes, crocodylomorphs, pterosaurs and dinosaurs. A new species of Dipnoi is reported in this ...
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,...
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 ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید