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Abstract/Summary
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<jats:title>Abstract</jats:title><jats:p>The early Cenomanian <jats:italic>crippsi</jats:italic> Event comprises a 1–3-m-thick interval characterised by mass occurrences of the early Cenomanian inoceramid <jats:italic>Gnesioceramus crippsi</jats:italic>, identified in the uppermost <jats:italic>Sharpeiceras schlueteri</jats:italic> Subzone (lower lower Cenomanian <jats:italic>Mantelliceras mantelli</jats:italic> Zone), below an interregional sequence boundary (SB Ce 1). At Lüneburg, the event is characterised by densely packed, very large, disc-like valves of <jats:italic>G</jats:italic>. <jats:italic>crippsi</jats:italic>. Taphonomy as well as bio- and microfacies suggest an event formation in a deeper shelf setting below the storm-wave base as primary biogenic concentration, the inoceramids living as recumbent forms on a soft substrate in dense populations. When tracked between basins, the stratigraphic pattern of the <jats:italic>crippsi</jats:italic> Event suggests a moderately prolonged phase (< 100 kyr) of increased shell production with rapid deposition aiding in preserving the shell-rich event strata. Towards the basin margins, it grades into storm wave-reworked bioclastic concentrations. The <jats:italic>crippsi</jats:italic> Event formed by an interregional population bloom and provides, as an proliferation epibole, an important marker for intra- and interbasinal correlation. The first record of <jats:italic>G. mowriensis</jats:italic> within the <jats:italic>crippsi</jats:italic> Event at Lüneburg, hitherto endemic to the US Western Interior Seaway, and the occurrence of the ammonite <jats:italic>Metengonoceras teigenense</jats:italic>, likewise an endemic North American faunal element, from the level of the <jats:italic>crippsi</jats:italic> Event in northern France indicate faunal exchange between the New and Old worlds during the early Cenomanian. This faunal dispersal and contemporaneous occurrence of warm-water biofacies in Western Europe during the early Cenomanian is explained by the existence of a perpetual NE-directed current transporting warm surface waters from the Gulf of Mexico towards Europe. The occurrence of short-lived <jats:italic>M</jats:italic>. <jats:italic>teigenense</jats:italic> in France allows for the calibration of the uppermost <jats:italic>schlueteri</jats:italic> Subzone of the <jats:italic>mantelli</jats:italic> Zone in Europe to the lowermost <jats:italic>Neogastroplites muelleri</jats:italic> Zone in North America and to assign an age of ~ 98.6–98.7 Ma to the <jats:italic>crippsi</jats:italic> Event.</jats:p>
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1000
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Hinweis
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DeepGreen-ID: 220af3a844ee4ea48c4cefb695302757 ; metadata provieded by: DeepGreen (https://www.oa-deepgreen.de/api/v1/), LIVIVO search scope life sciences (http://z3950.zbmed.de:6210/livivo), Crossref Unified Resource API (https://api.crossref.org/swagger-ui/index.html), to.science.api (https://frl.publisso.de/), ZDB JSON-API (beta) (https://zeitschriftendatenbank.de/api/), lobid - Dateninfrastruktur für Bibliotheken (https://lobid.org/resources/search)
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