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Formation of the ‘Great Unconformity’ as a trigger for the Cambrian explosion
TLDR
New stratigraphic and geochemical data are used to show that early Palaeozoic marine sediments deposited approximately 540–480 Myr ago record both an expansion in the area of shallow epicontinental seas and anomalous patterns of chemical sedimentation that are indicative of increased oceanic alkalinity and enhanced chemical weathering of continental crust.
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Burgess Shale-type Preservation and its Distribution in Space and Time
  • R. Gaines
  • Environmental Science, Geography
  • 1 October 2014
Burgess Shale-type fossil assemblages provide a unique record of animal life in the immediate aftermath of the so-called “Cambrian explosion.” While most soft-bodied faunas in the rock record were…
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Cambrian Burgess Shale–type deposits share a common mode of fossilization
Although Cambrian Burgess Shale–type (BST) biotas are fundamental to understanding the radiation of metazoans, the nature of their extraordinary preservation remains controversial. There remains…
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Mechanism for Burgess Shale-type preservation
Exceptionally preserved fossil biotas of the Burgess Shale and a handful of other similar Cambrian deposits provide rare but critical insights into the early diversification of animals. The…
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The Fezouata fossils of Morocco; an extraordinary record of marine life in the Early Ordovician
The discovery of the Fezouata biota in the latest Tremadocian of southeastern Morocco has significantly changed our understanding of the early Phanerozoic radiation. The shelly fossil record shows a…
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A new hypothesis for organic preservation of Burgess Shale taxa in the middle Cambrian Wheeler Formation, House Range, Utah
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Paleoecology of the familiar trilobite Elrathia kingii: An early exaerobic zone inhabitant
TLDR
It is inferred that E. kingii occupied the exaerobic zone, at the boundary of anoxic and dysoxic bottom waters, and it is likely that some other monospecific trilobite assemblages consisting of abundant articulated individuals may also be related to extreme, low-oxygen conditions.
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A new phyllopod bed-like assemblage from the Burgess Shale of the Canadian Rockies.
TLDR
The discovery of an extraordinary new soft-bodied fauna from the Burgess Shale is reported, and the presence of the stem arthropods Misszhouia and Primicaris, previously known only from the early Cambrian of China, suggests that the palaeogeographic ranges and longevity of Burgess Shales taxa may be underestimated.
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A new Burgess Shale–type assemblage from the “thin” Stephen Formation of the southern Canadian Rockies
A new Burgess Shale–type assemblage, from the Stephen Formation of the southern Canadian Rocky Mountains, is described herein. It occurs near Stanley Glacier in Kootenay National Park, 40 km…
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Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China
The International Commission on Stratigraphy and the IUGS Executive Committee have recently ratified a Global Standard Stratotype-section and Point (GSSP) defining the conterminous base of the third…
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