نتایج جستجو برای: neogene
تعداد نتایج: 1752 فیلتر نتایج به سال:
Miocene baleen whales were highly diverse and included tens of genera. However, their taxonomy and phylogeny, as well as relationships with living whales, are still a subject of controversy. Here, "Mesocetus" argillarius, a poorly known specimen from Denmark, is redescribed with a focus on the cranial anatomy. It was found to represent not only a new genus, Tranatocetus gen. nov., but also a ne...
Abstract Three volcanic arcs have been the source of New Zealand's activity since Neogene: Northland arc, Coromandel Volcanic Zone (CVZ) and Taupō (TVZ). The eruption chronology for Quaternary, sourced by TVZ, is well studied established, whereas evolution precursor arc systems, like CVZ (central c. 18 to 2 Ma), poorly known due limited accessibility to, or identification of, onshore deposits t...
DNA transposons are exposed to a molecular domestication process, which results in the formation of neogenes,which may play role human genetic instability. TIGD3 (Tigger-derived [TIGD] family proteins) is one ofthese Neogene, and its genome unknown.Aim: The expression Neogene colorectal cancer cell lines putative function carcinogenesisare being investigated.Method: protein gene was investigate...
the lut block in eastern iran is a micro-continental block within the convergent orogen between the arabian, eurasian and indian plates. large areas of the north-central, eastern, and western lut block are covered by volcanic rocks of paleogene, neogene and quaternary age. peak volcanic activity took place in the north-central part of the lut block during the eocene, and then dramatically decr...
We examined the phylogenetic relationships among 23 species of the North American aquatic snail genus Tryonia (Hydrobiidae), 10 additional representatives of the subfamily Cochliopinae, and two outgroups. Maximum parsimony analysis of a 601-base-pair sequence from the mitochondrial COI gene did not support monophyly of the genus nor its subgenus Paupertryonia. A clade composed of the type speci...
BACKGROUND The present-day amphibian and reptile fauna of Western Siberia are the least diverse of the Palaearctic Realm, as a consequence of the unfavourable climatic conditions that predominate in this region. The origin and emergence of these herpetofaunal groups are poorly understood. Aside from the better-explored European Neogene localities yielding amphibian and reptile fossil remains, t...
International Ocean Discovery Program (IODP) Expedition 359 cored sediments from eight borehole locations in the carbonate platform of the Maldives in the Indian Ocean. The expedition set out to unravel the timing of Neogene climate changes, in particular the evolution of the South Asian monsoon and fluctuations of the sea level. The timing of these changes are assessed by dating resultant sedi...
Abstract The lithium isotope composition (δ 7 Li) of seawater records important information on the evolution carbon and silicon cycles over geologic time. Here we report δ Li values in a suite Neogene dolostones (23–3.4 Ma, n = 39) from South China Sea. Over Neogene, dolostone have increased 24.9‰ to 30.1‰, overlapping previously published foraminifera documenting without applying any isotopic ...
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