English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

In a recent PNAS paper, Gaines et al. (1) proposed a mechanism of early diagenetic sealing and oxidant limitation to account for the preservation of Burgess Shale-type (BST) fossils (i.e., the “exceptional” preservation of carbonaceous compression fossils in Cambrian-aged marine mudstones) (1). It is an interesting hypothesis, but it raises a number of issues. If early carbonate cementation is the critical factor in BST preservation, then BST biotas should be consistently associated with bed-capping authigenic carbonate. Such a relationship simply does not exist. In terms of anatomical detail, by far the finest BST preservation is found in shales and mudstones with no detectable carbonate, most notably in …

Does cement-induced sulfate limitation account for Burgess Shale-type preservation?