Complex Tunnel Systems of Early Fortunian Macroscopic Endobenthos in the Ediacaran-Cambrian Transitional Strata of the Olenek Uplift (NE Siberian Platform) | Sciact - CRIS-system of Boreskov Institute of Catalysis

Complex Tunnel Systems of Early Fortunian Macroscopic Endobenthos in the Ediacaran-Cambrian Transitional Strata of the Olenek Uplift (NE Siberian Platform) Full article

Journal

Precambrian Research
ISSN: 0301-9268

Output data

Year: 2020, Volume: 340, Article number : 105627, Pages count : 15 DOI: 10.1016/j.precamres.2020.105627

Tags

Cambrian explosion; Evolutionary palaeoecology; Ichnoguilds; Ichnotaxonomy; Trace fossils

Authors

Marusin Vasiliy V. ^1,2 , Kuper Konstantin E. ³

Affiliations

1	Department of Stratigraphy and Sedimentology, Trofimuk Institute of Petroleum Geology and Geophysics of SB RAS, prospect Akademika Koptyuga 3, Novosibirsk, 630090, Russia
2	Department of Geology and Geophysics, Novosibirsk State University, ulitsa Pirogova 1, Novosibirsk 630090, Russia
3	Budker Institute of Nuclear Physics of SB RAS, prospect Akademika Lavrentieva 11, Novosibirsk, 630090, Russia

A progressive colonisation of marine sediments by vagile benthos in the late Ediacaran and early Cambrian led to a series of dramatic transformations in marine ecosystems. Nevertheless the Fortunian ichnoassemblages reveal unprecedented development of behavioural strategies and architectural designs. As a result of the scarcity of vertical bioturbators, only the few uppermost centimetres of sediment were affected by infaunal mixing. Multifaceted study of the trace fossil Olenichnus irregularis from the type locality (early Fortunian strata of the Olenek Uplift, northeastern Siberian Platform), originally interpreted as subhorizontal network burrows, demonstrates that these burrows represent complex three-dimensional tunnel systems, produced by infaunal bilaterians. Together with helicoidal burrows Gyrolithes, the trace fossil Olenichnus comprises one of the earliest evidence of active vertical sediment reworking by bilaterians. Taphonomy of the topotype Olenichnus and its spatial position related to other associated ichnotaxa reveal that origin of endobenthic tiering and multi-stage colonisation of bottom substrates by macroscopic bilaterians appeared at the very beginning of the Cambrian Period. Olenichnus compose the oldest mid-tier ichnoguild, associated with oxygen-depleted sediments below the redox-discontinuity surface located closely to the sediment-water interface in the Fortunian. © 2020 Elsevier B.V.

Marusin V.V. , Kuper K.E.
Complex Tunnel Systems of Early Fortunian Macroscopic Endobenthos in the Ediacaran-Cambrian Transitional Strata of the Olenek Uplift (NE Siberian Platform)
Precambrian Research. 2020. V.340. 105627 :1-15. DOI: 10.1016/j.precamres.2020.105627 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Oct 29, 2019
Accepted:	Jan 20, 2020
Published online:	Jan 23, 2020
Published print:	May 1, 2020

Web of science:	WOS:000521507700003
Scopus:	2-s2.0-85079037573
Elibrary:	43244765
Chemical Abstracts:	2020:273263
OpenAlex:	W3002623926

DB	Citing
Web of science	11
Scopus	12
OpenAlex	12