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date: 2026-08-27T06:32:21
publisher: vivo
type: Document
label: RDF description of Biostratigraphy and paleoenvironment of the Cenomanian/Turonian boundary interval based on foraminifera from WValles-San Luis Potosí Platform, Mexico - http://orbis.uaslp.mx/vivo/individual/scopus3045

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Biostratigraphy and paleoenvironment of the Cenomanian/Turonian boundary interval based on foraminifera from WValles-San Luis Potosí Platform, Mexico
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related by: authorship_17776
abstract: Lithologic and foraminiferal analysis from the western part of the Valles-San Luis Potosí platform reflect a sea-level rise suggesting that the platform was drowned at the Cenomanian-Turonian boundary interval. Benthic and planktic foraminiferal content of the succession was identified to establish the transition from the shallow-water carbonate sedimentation with abundant larger benthic foraminifera, algae, rudists and other molluscs, corals, echinoderms, worms changing to hemipelagic-pelagic sediments containing calcispheres and opportunistic foraminifers (r-strategists), such as whitenellids, hedbergellids, heterohelicids and elongated chambered forms, as well as radiolarians. The El Abra Limestone is dated as the middle-late Cenomanian age (Pseudolituonella reicheliAssemblage Zone) and was deposited on a warm shallow-marine rimmed platform. Peloidal-bioclastic packstone-grainstone is the dominant texture of these rocks. Lithological variations determined by the high detrital influx were followed by a major transgression when wackestone and marly limestone of the lower part of the Soyatal Formation were deposited. The transition to deeper open marine environments is dated as latest Cenomanian/earliest Turonian represented by the Whiteinella archaeocretacea Partial Taxon Range Zone and coincides with a global sea-level rise and the Oceanic Anoxic Event 2 (OAE 2). Deeper overlying deposits of the Helvetoglobotruncana helvetica Total Range Zone (early/middle Turonian) are characterized in the study area by the occurrence of the keeled forms (k strategists). The Cenomanian/Turonian boundary is placed within the Whiteinella archaeocretacea Partial Range Zone in absence of ammonite markers. When theValles-San Luis Potosí platformwas flooded, the carbonate factorywas stressed due to the trophic resource modifications. Production of a larger amount of nutrients led to the extinction of the k-strategist benthic foraminifera; only small benthic foraminifera survived for a …
related by: authorship_17773
type: Information Content Entity
most specific type: Article
issue: 6
date time value: article date 3046
estado: published
type: Thing
type: Document
related by: authorship_17774
page start: 457
type: Continuant
page end: 485
type: Entity
crisid: 3046
related by: authorship_17775
e iscopus: 2-s2.0-84877764634
has publication venue: Micropaleontology
freetext keyword: alga; benthic foraminifera; biostratigraphy; Cenomanian-Turonian boundary; coral; deposition; echinoderm; extinction; limestone; marine environment; mollusc; paleoenvironment; planktonic foraminifera; sea level change; sedimentation; transgression; Mexico [North America]; San Luis Potosi
type: Article
type: Generically Dependent Continuant
origen: scopus
volume: 58

Micropaleontology
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type: Document
type: Periodical
type: Generically Dependent Continuant
publication venue for: Biostratigraphy and paleoenvironment of the Cenomanian/Turonian boundary interval based on foraminifera from WValles-San Luis Potosí Platform, Mexico
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type: Entity