Sökning: onr:"swepub:oai:DiVA.org:nrm-5460" >
Mass occurrence of ...
Mass occurrence of echinoids in an Oligocene hydrocarbon-seep limestone from the Olympic Peninsula, Washington State, USA
-
- Müller, Sandro P (författare)
- Center for Earth System Research and Sustainability, Institute for Geology, University of Hamburg, Hamburg 20146, Germany
-
- Kroh, Andreas (författare)
- Natural History Museum Vienna, Geological–Palaeontological Department, Vienna 1010, Austria
-
- Birgel, Daniel (författare)
- Center for Earth System Research and Sustainability, Institute for Geology, University of Hamburg, Hamburg 20146, Germany
-
visa fler...
-
- Goedert, James L (författare)
- Burke Museum of Natural History and Culture, University of Washington, Seattle, WA 98195, USA
-
- Kiel, Steffen (författare)
- Naturhistoriska riksmuseet,Enheten för paleobiologi
-
- Peckmann, Jörn (författare)
- Center for Earth System Research and Sustainability, Institute for Geology, University of Hamburg, Hamburg 20146, Germany
-
visa färre...
-
(creator_code:org_t)
- 2023-03-10
- 2023
- Engelska.
-
Ingår i: Geological Magazine. - Cambridge : Cambridge University Press. - 0016-7568 .- 1469-5081. ; 160:5, s. 941-954
- Relaterad länk:
-
https://doi.org/10.1...
-
visa fler...
-
https://www.cambridg...
-
https://nrm.diva-por... (primary) (Raw object)
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Loose limestone blocks of a newly recognized hydrocarbon-seep deposit from the lower Oligocene Jansen Creek Member of the Makah Formation were collected on a beach terrace close to the mouth of Bullman Creek in Washington State, USA. The limestone consists largely of authigenic carbonate phases, including 13C-depleted fibrous cement forming banded and botryoidal crystal aggregates with δ13C values as low as –23.5 ‰. Lipids extracted from the limestone yielded molecular fossils of anaerobic methanotrophic archaea (ANME), dominated by compounds of an ANME-2/DSS consortium with δ13C values as low as −106 ‰, indicating formation at an ancient methane seep. The fossil inventory of the seep deposit is remarkable, consisting almost solely of echinoid remains, whereas typical seep biota are absent. Varying preservation of the echinoid fossils indicates parautochthonous deposition, corroborated by evidence for high fluid flow at the ancient seep, possibly responsible for displacement of echinoids after death. Although a full taxonomic description of the echinoids cannot be given, almost all fossils were assigned to one taxon of irregular spatangoids, except for a single regular echinoid. Abundance and lifestyle of the irregular spatangoids in the Bullman Creek echinoid seep deposit resemble those of the fossil Tithonia oxfordiana from an upper Jurassic seep deposit in France and extant Sarsiaster griegii from modern seeps in the Gulf of Mexico. The Bullman Creek echinoid deposit probably represents a fossil analogue of the Gulf of Mexico Sarsiaster mass occurrence, indicating that the adaptation of spatangoid echinoids to chemosynthesis-based ecosystems ranges back at least to the earliest Oligocene.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- Echinoidea
- spatangoids
- methanotrophic archaea
- chemosynthesis
- lipid biomarkers
- Makah Formation
- Ecosystems and species history
- Ekosystem och arthistoria
- The changing Earth
- Den föränderliga jorden
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas