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Sequoites Dakotensis
''Sequoites dakotensis'', previously known as ''Sequoia dakotensis'', was a species of plant that existed during the Upper Cretaceous, end of the Cretaceous. Originally described as a coniferous tree in the genus ''Sequoia (genus), Sequoia'' from fossils found in the U.S. state of North Dakota, further discoveries in the Canadian province of Saskatchewan indicate that it may have instead belonged to the genus ''Parataxodium''. The species was first described by the paleobotanist Roland W. Brown in 1935 from fossilized Conifer cone, cones found in the Hell Creek Formation along the Cannonball River in North Dakota. The cones had no natural connection to foliage, meaning no description of the species's foliage could be given; this was not unusual among ''Sequoia'' species described from fossils. In 1949, the paleobotanist Walter A. Bell renamed the species, moving it to the Cupressaceae, cupressaceous fossil taxon ''Sequoites dakotensis'', based on cone fossils found near Edmonton. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upper Cretaceous
The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Austral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
