Universität zu Köln

Zhang, Xingliang ORCID: 0000-0003-1103-2799, Ahlberg, Per, Babcock, Loren E., Choi, Duck K., Geyer, Gerd, Gozalo, Rodolfo ORCID: 0000-0001-7985-9843, Hollingsworth, J. Stewart, Li, Guoxiang, Naimark, Elena B., Pegel, Tatyana, Steiner, Michael, Wotte, Thomas and Zhang, Zhifei (2017). Challenges in defining the base of Cambrian Series 2 and Stage 3. Earth-Sci. Rev., 172. S. 124 - 140. AMSTERDAM: ELSEVIER SCIENCE BV. ISSN 1872-6828

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Abstract

Formal subdivision of the Cambrian System into four series and ten stages is in progress. The base of Cambrian Stage 3 (provisional), which is conterminous with the base of Cambrian Series 2 (provisional), is expected to be placed at a horizon close to the first appearance of trilobites, which marks the onset of the largest phase of the Cambrian explosion. Conceptually, an ideal boundary position would be marked by a significant and globally recognizable bioevent that divides the lower part of the Cambrian System into a sub-trilobitic Terreneuvian Series and a trilobite-dominated Series 2. If the level is to be identified principally through biostratigraphic means, its position also needs to be recognizable using non-biostratigraphic means, and its correlation potential should be tested through detailed investigation of several continuous successions embracing the critical interval. Major difficulties in identifying a suitable horizon include strong biotic provincialism, a plethora of regional unconformities, and facies changes on different paleocontinents in the Cambrian Terreneuvian-Series 2 boundary interval. Levels that provide potential for intercontinental correlation include the first appearance position of trilobites and the approximately equivalent first appearance positions of certain small shelly fossil and acritarch species. In addition, a non-biostratigraphic marker, such as a stable carbon isotopic excursion, may be useful as a correlation level. Cambrian Series 2 and Stage 3 are provisional stratigraphic units, and their conterminous base was previously suggested to coincide to the appearance of trilobites. Compared to other potential chronostratigraphic indicators, the first appearance of trilobites still has advantages for recognizing and correlating the base of Stage 3, and should remain as the provisional primary marker for the boundary position.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhang, Xingliang UNSPECIFIED orcid.org/0000-0003-1103-2799 UNSPECIFIED Ahlberg, Per UNSPECIFIED UNSPECIFIED UNSPECIFIED Babcock, Loren E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Choi, Duck K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Geyer, Gerd UNSPECIFIED UNSPECIFIED UNSPECIFIED Gozalo, Rodolfo UNSPECIFIED orcid.org/0000-0001-7985-9843 UNSPECIFIED Hollingsworth, J. Stewart UNSPECIFIED UNSPECIFIED UNSPECIFIED Li, Guoxiang UNSPECIFIED UNSPECIFIED UNSPECIFIED Naimark, Elena B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Pegel, Tatyana UNSPECIFIED UNSPECIFIED UNSPECIFIED Steiner, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Wotte, Thomas UNSPECIFIED UNSPECIFIED UNSPECIFIED Zhang, Zhifei UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-220684
DOI:	10.1016/j.earscirev.2017.07.017
Journal or Publication Title:	Earth-Sci. Rev.
Volume:	172
Page Range:	S. 124 - 140
Date:	2017
Publisher:	ELSEVIER SCIENCE BV
Place of Publication:	AMSTERDAM
ISSN:	1872-6828
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language FOSSIL ASSEMBLAGES; SOUTH-AUSTRALIA; FLINDERS RANGES; EARLY EVOLUTION; ANTI-ATLAS; BIOSTRATIGRAPHY; CHRONOSTRATIGRAPHY; CONSTRAINTS; TRILOBITES; RADIATION Multiple languages Geosciences, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/22068