Proposed stratotype for the base of the Lawsonian stage (Cambrian srafe 10) at the first appearancec datum of Eoconodontus notchpeakensis (miller) in the house range, Utah, USA
The name Lawsonian Stage is proposed as the highest stage of the Cambrian System (Stage 10). The base of the proposed Lawsonian Stage is at the First Appearance Datum (FAD) of the euconodont Eoconodontus notchpeakensis (Miller, 1969). That horizon, the base of the E. notchpeakensis Subzone of the Eo...
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2011
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Online Access: | https://bearworks.missouristate.edu/articles-cnas/1884 https://doi.org/10.3140/bull.geosci.1255 |
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ftmissouristuniv:oai:bearworks.missouristate.edu:articles-cnas-2883 2023-05-15T17:22:46+02:00 Proposed stratotype for the base of the Lawsonian stage (Cambrian srafe 10) at the first appearancec datum of Eoconodontus notchpeakensis (miller) in the house range, Utah, USA Miller, James F. Evans, Kevin R. Freeman, Rebecca L. Ripperdan, Robert L. Taylor, John F. 2011-10-05T07:00:00Z https://bearworks.missouristate.edu/articles-cnas/1884 https://doi.org/10.3140/bull.geosci.1255 unknown BearWorks https://bearworks.missouristate.edu/articles-cnas/1884 https://doi.org/10.3140/bull.geosci.1255 College of Natural and Applied Sciences Brachiopods Cambrian Carbon isotopes Chronostratigraphy Conodonts Furongian HERB event Lawsonian Stage 10 Trilobites text 2011 ftmissouristuniv https://doi.org/10.3140/bull.geosci.1255 2022-02-28T19:45:49Z The name Lawsonian Stage is proposed as the highest stage of the Cambrian System (Stage 10). The base of the proposed Lawsonian Stage is at the First Appearance Datum (FAD) of the euconodont Eoconodontus notchpeakensis (Miller, 1969). That horizon, the base of the E. notchpeakensis Subzone of the Eoconodontus Zone, is 3mabove the base of the Red Tops Member of the Notch Peak Formation at the Steamboat Pass section in the House Range, western Utah, USA. The conodont fauna of the Eoconodontus Zone is widespread in North America and occurs in Asia, Australia, Europe, and South America in facies that include cratonic nearshore sandstones, shallow and intermediate-depth platform carbonates, deep-water ramp, continental slope deposits, and deep-ocean radiolarian chert. This horizon lies at or slightly below the top of the Illaenurus trilobite Zone of western North America and within the lower part of the Saukiella junia Subzone of the Saukia Zone in areas east of the Rocky Mountains. These trilobite and conodont faunas can be traced into slope deposits containing cosmopolitan trilobites. The horizon is nearly coincident with the boundary between the Billingsella and the Finkelnburgia calcitic brachiopod Zones; ranges of organophosphatic brachiopods also characterize the horizon. A high-amplitude, negative, carbon-isotope excursion, the HERB Event, occurs in the Eoconodontus notchpeakensis Subzone. This distinctive geochemical signal is known in western Utah, Australia, China, and in poorly fossiliferous slope deposits in Newfoundland, Canada. The proposed boundary fits between two closely spaced sequence-stratigraphic boundaries described from Utah and Texas, USA. Text Newfoundland Missouri State University: BearWorks Canada Notch Peak ENVELOPE(-125.920,-125.920,56.166,56.166) Steamboat ENVELOPE(-123.720,-123.720,58.683,58.683) Bulletin of Geosciences 595 620 |
institution |
Open Polar |
collection |
Missouri State University: BearWorks |
op_collection_id |
ftmissouristuniv |
language |
unknown |
topic |
Brachiopods Cambrian Carbon isotopes Chronostratigraphy Conodonts Furongian HERB event Lawsonian Stage 10 Trilobites |
spellingShingle |
Brachiopods Cambrian Carbon isotopes Chronostratigraphy Conodonts Furongian HERB event Lawsonian Stage 10 Trilobites Miller, James F. Evans, Kevin R. Freeman, Rebecca L. Ripperdan, Robert L. Taylor, John F. Proposed stratotype for the base of the Lawsonian stage (Cambrian srafe 10) at the first appearancec datum of Eoconodontus notchpeakensis (miller) in the house range, Utah, USA |
topic_facet |
Brachiopods Cambrian Carbon isotopes Chronostratigraphy Conodonts Furongian HERB event Lawsonian Stage 10 Trilobites |
description |
The name Lawsonian Stage is proposed as the highest stage of the Cambrian System (Stage 10). The base of the proposed Lawsonian Stage is at the First Appearance Datum (FAD) of the euconodont Eoconodontus notchpeakensis (Miller, 1969). That horizon, the base of the E. notchpeakensis Subzone of the Eoconodontus Zone, is 3mabove the base of the Red Tops Member of the Notch Peak Formation at the Steamboat Pass section in the House Range, western Utah, USA. The conodont fauna of the Eoconodontus Zone is widespread in North America and occurs in Asia, Australia, Europe, and South America in facies that include cratonic nearshore sandstones, shallow and intermediate-depth platform carbonates, deep-water ramp, continental slope deposits, and deep-ocean radiolarian chert. This horizon lies at or slightly below the top of the Illaenurus trilobite Zone of western North America and within the lower part of the Saukiella junia Subzone of the Saukia Zone in areas east of the Rocky Mountains. These trilobite and conodont faunas can be traced into slope deposits containing cosmopolitan trilobites. The horizon is nearly coincident with the boundary between the Billingsella and the Finkelnburgia calcitic brachiopod Zones; ranges of organophosphatic brachiopods also characterize the horizon. A high-amplitude, negative, carbon-isotope excursion, the HERB Event, occurs in the Eoconodontus notchpeakensis Subzone. This distinctive geochemical signal is known in western Utah, Australia, China, and in poorly fossiliferous slope deposits in Newfoundland, Canada. The proposed boundary fits between two closely spaced sequence-stratigraphic boundaries described from Utah and Texas, USA. |
format |
Text |
author |
Miller, James F. Evans, Kevin R. Freeman, Rebecca L. Ripperdan, Robert L. Taylor, John F. |
author_facet |
Miller, James F. Evans, Kevin R. Freeman, Rebecca L. Ripperdan, Robert L. Taylor, John F. |
author_sort |
Miller, James F. |
title |
Proposed stratotype for the base of the Lawsonian stage (Cambrian srafe 10) at the first appearancec datum of Eoconodontus notchpeakensis (miller) in the house range, Utah, USA |
title_short |
Proposed stratotype for the base of the Lawsonian stage (Cambrian srafe 10) at the first appearancec datum of Eoconodontus notchpeakensis (miller) in the house range, Utah, USA |
title_full |
Proposed stratotype for the base of the Lawsonian stage (Cambrian srafe 10) at the first appearancec datum of Eoconodontus notchpeakensis (miller) in the house range, Utah, USA |
title_fullStr |
Proposed stratotype for the base of the Lawsonian stage (Cambrian srafe 10) at the first appearancec datum of Eoconodontus notchpeakensis (miller) in the house range, Utah, USA |
title_full_unstemmed |
Proposed stratotype for the base of the Lawsonian stage (Cambrian srafe 10) at the first appearancec datum of Eoconodontus notchpeakensis (miller) in the house range, Utah, USA |
title_sort |
proposed stratotype for the base of the lawsonian stage (cambrian srafe 10) at the first appearancec datum of eoconodontus notchpeakensis (miller) in the house range, utah, usa |
publisher |
BearWorks |
publishDate |
2011 |
url |
https://bearworks.missouristate.edu/articles-cnas/1884 https://doi.org/10.3140/bull.geosci.1255 |
long_lat |
ENVELOPE(-125.920,-125.920,56.166,56.166) ENVELOPE(-123.720,-123.720,58.683,58.683) |
geographic |
Canada Notch Peak Steamboat |
geographic_facet |
Canada Notch Peak Steamboat |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
College of Natural and Applied Sciences |
op_relation |
https://bearworks.missouristate.edu/articles-cnas/1884 https://doi.org/10.3140/bull.geosci.1255 |
op_doi |
https://doi.org/10.3140/bull.geosci.1255 |
container_title |
Bulletin of Geosciences |
container_start_page |
595 |
op_container_end_page |
620 |
_version_ |
1766109599739412480 |