Acritarchs and prasinophytes of the Silurian-Devonian GSSP (Klonk, Barrandian area, Czech Republic)
نویسندگان
چکیده
منابع مشابه
Shallow−water occurrence of Wiwaxia in the middle Cambrian of the Barrandian area, Czech Republic
A rich record of specimens with slightly sclerotised skeletal parts or even soft−bodied fossils have been established from several well−known lower and middle Cambrian Lagerstätte, e.g., Bur− gess Shale of the Stephen Formation, Kinzers, Marjum, and Wheeler formations in North America; Buen Formation in North Greenland; Doushantuo, Chengjiang, and Kaili in China; Emu Bay Shale in Australia and ...
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Among the oldest convincing fossils of early vascular land plants are those of the Division Rhyniophyta. The members of this division consist of: (1) simple axes with cuticle, stomates, epidermis, cortex and a terete (circular) centrarch xylem (xylem development occurs from the center of the stem to the periphery), without well-developed appendages or roots; (2) simple, isotomous branching syst...
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Carbon isotope (N13C) analyses of marine carbonates spanning the Silurian^Devonian transition are compared from three richly fossiliferous, well-dated sequences in North America. The three sections, in the central Appalachian Mountains (West Virginia), Great Basin (Nevada), and the southern Mid-continent (Oklahoma), reveal positive N13C shifts beginning in the late Pridoli and reaching peak val...
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The phylogenetic position of scorpions within the Chelicerata has been the subject of much debate in recent years (e.g. Weygoldt & Paulus, 1979; Bergström, 1980; Van der Hammen, 1989; Shultz, 1990; Starobogatov, 1990), but it revolves around one primary question: are scorpions part of a monophyletic Arachnida, or are they “merostomes” which exhibit a terrestrial grade of existence? Inclusion of...
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ژورنال
عنوان ژورنال: Bulletin of Geosciences
سال: 2006
ISSN: 1802-8225,1214-1119
DOI: 10.3140/bull.geosci.2006.01.027