Supplementary material from "Aluminosilicate haloes preserve complex life approximately 800 million years ago"
Version 2 2020-06-11, 08:08
Version 1 2020-05-04, 17:57
Posted on 2020-06-11 - 08:08
Mudstone-hosted microfossils are a major component of the Proterozoic fossil record, particularly dominating the record of early eukaryotic life. Early organisms possessed no biomineralized parts to resist decay and controls on their fossilization in mudstones are poorly understood. Consequently, the Proterozoic fossil record is compromised—we do not know whether changing temporal/spatial patterns of microfossil occurrences reflect evolution or the distribution of favourable fossilization conditions. We investigated fossilization within the approximately 1000 Mya Lakhanda Group (Russia) and the approximately 800 Mya Svanbergfjellet and Wynniatt formations (Svalbard and Arctic Canada). Vertical sections of microfossils and surrounding matrices were extracted from thin sections by focused ion beam milling. Elemental mapping and synchrotron-based infrared microspectroscopy revealed that microfossils are surrounded by haloes rich in aluminium, likely hosted in kaolinite. Kaolinite has been implicated in Cambrian Burgess Shale-type (BST) fossilization and is known to slow the growth of degraders. The Neoproterozoic mudstone microfossil record may be biased to tropical settings conducive to kaolinite formation. These deposits lack metazoan fossils even though they share fossilization conditions with younger BST deposits that are capable of preserving non-mineralizing metazoans. Thus metazoans, at least those typically preserved in BST deposits, were likely absent from sedimentary environments before approximately 800 Mya.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Anderson, Ross P.; Tosca, Nicholas J.; Cinque, Gianfelice; Frogley, Mark D.; Lekkas, Ioannis; Akey, Austin; et al. (2020). Supplementary material from "Aluminosilicate haloes preserve complex life approximately 800 million years ago". The Royal Society. Collection. https://doi.org/10.6084/m9.figshare.c.4963142.v2
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
Read the peer-reviewed publication
AUTHORS (10)
RA
Ross P. Anderson
NT
Nicholas J. Tosca
GC
Gianfelice Cinque
MF
Mark D. Frogley
IL
Ioannis Lekkas
AA
Austin Akey
GH
Gareth M. Hughes
KB
Kristin D. Bergmann
AK
Andrew H. Knoll
DB
Derek E.G. Briggs