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The earliest Burgess Shale-type biota to be described, being documneted 25 years before the Burgess Shale itself. [47] Kaili Formation. 513–501 Ma Guizhou, China The middle part of the Kaili Formation, the Oryctocephalus indicus Zone, contains a Burgess Shale-type lagerstätte with many well-preserved fossils known collectively as the Kaili ...
The Burgess Shale is a fossil-bearing deposit exposed in the Canadian Rockies of British Columbia, Canada. [ 2 ] [ 3 ] It is famous for the exceptional preservation of the soft parts of its fossils. At 508 million years old ( middle Cambrian ), [ 4 ] it is one of the earliest fossil beds containing soft-part imprints.
The Burgess Shale is a series of sediment deposits spread over a vertical distance of hundreds of metres, extending laterally for at least 50 kilometres (30 mi). [18] The deposits were originally laid down on the floor of a shallow sea; during the Late Cretaceous Laramide orogeny, mountain-building processes squeezed the sediments upwards to their current position at around 2,500 metres (8,000 ...
A Burgess Shale trilobite showing soft-part preservation. Burgess Shale-type deposits occur either on the continental slope or in a sedimentary basin.They are known in sediments deposited at all water depths during the Precambrian (Riphean stage onwards), with a notable gap in the last 150 million years of the Proterozoic. [6]
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Located in the Yunnan Province of South China and hosted in the geologically distinct Cambrian Stage 4 Wulongqing Formation, The Guanshan biota are also Burgess shale-type fossils but slightly younger than the Chengjian biota with an age dating to 515–510 Myr. [28] [29] Brachiopods are the most abundant species, [30] followed by trilobites ...
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Burgessochaeta is an extinct genus of polychaete annelids from the Middle Cambrian.Its fossils have been found in the Burgess Shale in British Columbia, Canada.A total of 189 specimens of Burgessochaeta are known from the Greater Phyllopod bed, where they comprise 0.36% of the community. [1]