نتایج جستجو برای: pleistocene
تعداد نتایج: 8977 فیلتر نتایج به سال:
The Tennessee River Basin is considered one of the most important regions for freshwater biodiversity anywhere on the globe. The Tennessee River Basin currently includes populations of at least half of the described contemporary diversity of extant North American freshwater fishes, crayfish, mussel, and gastropod species. However, comparatively little is known about the biodiversity of this bas...
Pleistocene basaltic lava flows, consisting of trachybasalt and basaltic trachyandesite, cover an area north-northwest of Shahre-Babak in southeastern Iran. The whole rock chemistry indicates that the lavas are dominantly alkaline and mildly calc-alkaline. Variation diagrams of SiO2 with major and trace elements are consistent with fractional crystallization processes involving olivine, pyroxen...
Nonglacial deposits Artificial fill (Holocene)—Mud, sand, and gravel of varying proportions, possibly including foreign debris such as concrete, logs, timbers, or brick. Used for highway roadbeds and other construction. Thickness generally greater than 2 m. Mapped where fill substantially obscures or has altered original geologic deposit. Beach deposits (Holocene)—Soft sand, silt, and mud depos...
Citation: Enk J, Devault A, Widga C, Saunders J, Szpak P, Southon J, Rouillard J-M, Shapiro B, Golding GB, Zazula G, Froese D, Fisher DC, MacPhee RDE and Poinar H (2016) Mammuthus Population Dynamics in Late Pleistocene North America: Divergence, Phylogeography, and Introgression. Front. Ecol. Evol. 4:42. doi: 10.3389/fevo.2016.00042 Mammuthus Population Dynamics in Late Pleistocene North Ameri...
Analysis of skulls and mandibles of the fossil Beringian lion demonstrate that the small lion that inhabited Yakutia (Russia), Alaska (USA), and the Yukon Territory (Canada) is a new subspecies described here as Pu~ltl lcra spelncu z~erc.sl7c-llugirri n. subsp. It differs from the European cave lion P. spelacu (terra typica: Gailenreutl~ Cave, Germany, Late Pleistocene) by its smaller size and ...
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