[Rockhounds] Exceptional preservation might require oxygen to occur

[Paul]

Exceptional fossils may need a breath of air to form
University of Texas at Austin, November 6, 2019
https://phys.org/news/2019-11-exceptional-fossils-air.html
https://www.sciencedaily.com/releases/2019/11/191106112109.htm
https://www.eurekalert.org/pub_releases/2019-11/uota-efm110519.php

Exceptionally preserved Jurassic sea life found in new fossil site
by University of Texas at Austin
https://phys.org/news/2017-01-exceptionally-jurassic-sea-life-fossil.html

The paper is:

A.D. Muscente Et Al, Taphonomy Of The Lower Jurassic
Konservat-Lagerstätte At Ya Ha Tinda (Alberta, Canada)
And Its Significance For Exceptional Fossil Preservation
During Oceanic Anoxic Events, Palaios (2019). DOI: 10.2110/Palo.2019.050
https://pubs.geoscienceworld.org/sepm/palaios/article/34/11/515/574686/TAPHONOMY-OF-THE-LOWER-JURASSIC

Martindale, R.C., Them, T.R., Gill, B.C., Marroquín, S.M.
and Knoll, A.H., 2017. A new Early Jurassic (ca. 183 Ma)
fossil Lagerstätte from Ya Ha Tinda, Alberta, Canada.
Geology, 45(3).
https://par.nsf.gov/servlets/purl/10066020
https://vtechworks.lib.vt.edu/bitstream/handle/10919/81874/Geology%202017%20Martindale-2.pdf?sequence=1

Yours,

Paul H.