The Ecology of the Cambrian Radiation - Andrey Zhuravlev - Chapter 7 pdf

... compos- ite/condensed shell beds (Li and Droser 19 97) . 0 7- C1099 8/10/00 2:08 PM Page 153 THE CAMBRIAN RADIATION AND THE DIVERSIFICATION OF SEDIMENTARY FABRICS 1 57 Figure 7. 3 Examples of Cambrian ... fosforitonosnoy obolovoy tolshchi na severo-zapade Russkoy platformy [Reference sections and stratig- raphy of the Cambrian- Ordovician phos- phorite-bearing Obolus Uni...

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... from Australia and the ori- gin of starfishes. Memoirs of the Queensland Museum 28 :71 5 77 8. Sprinkle, J. 1 973 . Morphology and Evolution of Blastozoan Echinoderms. Museum of Com- parative Zoology ... comprising the Sauk Sequence of Sloss ECOLOGIC RADIATION OF CAMBRO-ORDOVICIAN ECHINODERMS 429 19-C1099 8/10/00 2:19 PM Page 429 ECOLOGIC RADIATION OF CAMBRO-ORDOVICIAN...

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... quality of seawater, thereby allowing the radiation of di- verse phototrophic communities (Zhuravlev chapter 8; Burzin et al. chapter 10); how the appearance of framework-building organisms created ... theme of community considers the biotas in their ecologic context, from their di- versification to the development of planktonic, level-bottom, reef, hardground, and deep-w...

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... 1995). The prob- lem of relating the two scales is complicated by the fact that the base of the Tom- motian was taken as the base of the Cambrian at 570 Ma in Harland et al. 1990. Since then, the ... supported by the back- tracking of the Baltica APWP for poles older than 477 Ma over the younger part of the same path (see figure 2.3). The remaining non-Sov...

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... of the Innuitian Belt in the Cana- dian Arctic, which still await solution. There is no general agreement on the paleo- geographic boundaries of Siberia for the Vendian and Cambrian. The southern ... in the late Precambrian–Early Cambrian Ara Forma- tion of Southern Oman. In A. H. F. Rob- ertson, M. P. Searl, and A. C. Ries, eds., The Geology and Tectonics of the Om...

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... bulging of the crust and transgression of the platform proceeded. Com- parison of the 87 Sr/ 86 Sr record of the Ediacarian -Cambrian with that of the Cenozoic (Derry et al. 1994) suggests that the ... 1994. The period of evolution- ary failure and the dawn of evolutionary success: The record of biotic changes across the Precambrian -Cambrian bound- ar...

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... Palaeoecology 131: 175 – 178 . Edwards, M. B. 19 97. Comments: Discussion of glacial or non-glacial origin for the Big- ganjargga Tillite, Finnmark, northern Nor- way. Geological Magazine 134: 873 – 874 . Eerola, ... above Varanger-age glacial deposits in New- foundland, Canada. Journal of Sedimentary Research 69 :78 9 79 3. Nicholas, C. J. 1996. The isotopic evolution of the ocea...

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... 1992). The boundary is placed at the base of the Wang- konda Formation and at the base of the trace fossil–bearing sandstones of the Winulta Formation in the Stansbury Basin. The Precambrian -Cambrian ... 1992. Ion-probe zircon dating of a mid-Early Cambrian tuff in South Australia. Journal of the Geological Society of London 149:185–192. Daily, B. 1 972 . Th...

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... 1986. The community structure of the Middle Cambrian Phyllo- pod Bed (Burgess Shale). Palaeontology 29: 423–4 67. Conway Morris, S. 19 87. The search for the Precambrian -Cambrian boundary. Scien- tific ... Early Cambrian arthropods ex- ploiting planktic habitats. The analysis of the contribution of trophic guilds to the Early Cambrian radiation shows that the t...

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... 1996); how- ever, it is the taphonomic loss of “soft-bodied” constituents that stands as the over- arching bias of the fossil record. These typically unfossilized forms comprise a ma- jority of taxa ... of an early Paleo- zoic plankton and benthos, but they place the transition at the end of the Cambrian rather than the beginning. Certainly the Cambro-Ordovician tr...

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