Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera

Autores
Monteros, Julio A.; Moya, Maria Cristina
Año de publicación
2003
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The aim of this contribution is to make known a graptolite assemblage from the Upper Tremadocian coming from the Mojotoro Range on the southeast part of the Argentine Eastern Cordillera (Figure 1a,b). The fossiliferous deposits correspond to the lower part of San Bernardo Formation (SBF) exposed on the hill of the same name, immediately to the east of Salta city (Figure 1b). The SBF outcrops along the park roadway up to San Bernardo; this route is one of the most important tourist attractions in the city of Salta, which assures a fast and easy access to the outcrops. The SBF is composed of silty shales, siltstones and fine– grained olive–green wackes deposited in a marine environment of transitional facies between the inshore and offshore shelf. Sandstone and conglomerate beds assigned to storm and gravity flow deposits are interbedded in the succession of shales and fine wackes. The SBF has been assigned an Arenigian age because it contains graptolites of this age (Loss, 1951) and typical trilobites belonging to the "Thysanopyge Fauna" (Harrington, 1957). The forms described by Loss (1951) include, among others, Clonograptus flexilis (Hall), Tetragraptus lavalensis (Ruedemann), T. sanbernardicus Loss, Didymograptus vacillans Tullberg, D. deflexus Elles and Wood, D. v–fractus Salter and D. nitidus (Hall). Later on, Moya et al. (1994) mention Pendeograptus fruticosus (Hall), Didymograptus cf. vacillans Tullberg and Schizograptus sp. An late Tremadocian age for the beginning of the SBF deposits has been proposed by Moya (1998) and thus could potentially record the Tremadocian–Arenigian boundary. The SBF belongs to the Santa Victoria Group (SVG; Upper Cambrian–Caradocian), which is composed of an alternating succession of sandstone and shale units (Figure 1c). The SVG overlies the Meson Group (Middle–Upper Cambrian) through a clear erosional disconformity (Figure 1c).
Fil: Monteros, Julio A.. Universidad Nacional de Salta. Consejo de Investigacion; Argentina. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina
Fil: Moya, Maria Cristina. Universidad Nacional de Salta. Consejo de Investigacion; Argentina. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina
Materia
GRAPTOLITES
LATE TREMADOCIAN
EASTERN CORDILLERA
ARGENTINA
ORDOVICIAN
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/134882

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oai_identifier_str oai:ri.conicet.gov.ar:11336/134882
network_acronym_str CONICETDig
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network_name_str CONICET Digital (CONICET)
spelling Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern CordilleraMonteros, Julio A.Moya, Maria CristinaGRAPTOLITESLATE TREMADOCIANEASTERN CORDILLERAARGENTINAORDOVICIANhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The aim of this contribution is to make known a graptolite assemblage from the Upper Tremadocian coming from the Mojotoro Range on the southeast part of the Argentine Eastern Cordillera (Figure 1a,b). The fossiliferous deposits correspond to the lower part of San Bernardo Formation (SBF) exposed on the hill of the same name, immediately to the east of Salta city (Figure 1b). The SBF outcrops along the park roadway up to San Bernardo; this route is one of the most important tourist attractions in the city of Salta, which assures a fast and easy access to the outcrops. The SBF is composed of silty shales, siltstones and fine– grained olive–green wackes deposited in a marine environment of transitional facies between the inshore and offshore shelf. Sandstone and conglomerate beds assigned to storm and gravity flow deposits are interbedded in the succession of shales and fine wackes. The SBF has been assigned an Arenigian age because it contains graptolites of this age (Loss, 1951) and typical trilobites belonging to the "Thysanopyge Fauna" (Harrington, 1957). The forms described by Loss (1951) include, among others, Clonograptus flexilis (Hall), Tetragraptus lavalensis (Ruedemann), T. sanbernardicus Loss, Didymograptus vacillans Tullberg, D. deflexus Elles and Wood, D. v–fractus Salter and D. nitidus (Hall). Later on, Moya et al. (1994) mention Pendeograptus fruticosus (Hall), Didymograptus cf. vacillans Tullberg and Schizograptus sp. An late Tremadocian age for the beginning of the SBF deposits has been proposed by Moya (1998) and thus could potentially record the Tremadocian–Arenigian boundary. The SBF belongs to the Santa Victoria Group (SVG; Upper Cambrian–Caradocian), which is composed of an alternating succession of sandstone and shale units (Figure 1c). The SVG overlies the Meson Group (Middle–Upper Cambrian) through a clear erosional disconformity (Figure 1c).Fil: Monteros, Julio A.. Universidad Nacional de Salta. Consejo de Investigacion; Argentina. Universidad Nacional de Salta. Facultad de Ciencias Naturales; ArgentinaFil: Moya, Maria Cristina. Universidad Nacional de Salta. Consejo de Investigacion; Argentina. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; ArgentinaInstituto Superior de Correlación Geológica2003info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/134882Monteros, Julio A.; Moya, Maria Cristina; Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera; Instituto Superior de Correlación Geológica; Serie de Correlación Geológica; 18; 2003; 1-61514-41861666-9479CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://insugeo.org.ar/publicaciones/docs/scg_18/12.htminfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:10:50Zoai:ri.conicet.gov.ar:11336/134882instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:10:50.537CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
title Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
spellingShingle Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
Monteros, Julio A.
GRAPTOLITES
LATE TREMADOCIAN
EASTERN CORDILLERA
ARGENTINA
ORDOVICIAN
title_short Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
title_full Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
title_fullStr Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
title_full_unstemmed Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
title_sort Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
dc.creator.none.fl_str_mv Monteros, Julio A.
Moya, Maria Cristina
author Monteros, Julio A.
author_facet Monteros, Julio A.
Moya, Maria Cristina
author_role author
author2 Moya, Maria Cristina
author2_role author
dc.subject.none.fl_str_mv GRAPTOLITES
LATE TREMADOCIAN
EASTERN CORDILLERA
ARGENTINA
ORDOVICIAN
topic GRAPTOLITES
LATE TREMADOCIAN
EASTERN CORDILLERA
ARGENTINA
ORDOVICIAN
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The aim of this contribution is to make known a graptolite assemblage from the Upper Tremadocian coming from the Mojotoro Range on the southeast part of the Argentine Eastern Cordillera (Figure 1a,b). The fossiliferous deposits correspond to the lower part of San Bernardo Formation (SBF) exposed on the hill of the same name, immediately to the east of Salta city (Figure 1b). The SBF outcrops along the park roadway up to San Bernardo; this route is one of the most important tourist attractions in the city of Salta, which assures a fast and easy access to the outcrops. The SBF is composed of silty shales, siltstones and fine– grained olive–green wackes deposited in a marine environment of transitional facies between the inshore and offshore shelf. Sandstone and conglomerate beds assigned to storm and gravity flow deposits are interbedded in the succession of shales and fine wackes. The SBF has been assigned an Arenigian age because it contains graptolites of this age (Loss, 1951) and typical trilobites belonging to the "Thysanopyge Fauna" (Harrington, 1957). The forms described by Loss (1951) include, among others, Clonograptus flexilis (Hall), Tetragraptus lavalensis (Ruedemann), T. sanbernardicus Loss, Didymograptus vacillans Tullberg, D. deflexus Elles and Wood, D. v–fractus Salter and D. nitidus (Hall). Later on, Moya et al. (1994) mention Pendeograptus fruticosus (Hall), Didymograptus cf. vacillans Tullberg and Schizograptus sp. An late Tremadocian age for the beginning of the SBF deposits has been proposed by Moya (1998) and thus could potentially record the Tremadocian–Arenigian boundary. The SBF belongs to the Santa Victoria Group (SVG; Upper Cambrian–Caradocian), which is composed of an alternating succession of sandstone and shale units (Figure 1c). The SVG overlies the Meson Group (Middle–Upper Cambrian) through a clear erosional disconformity (Figure 1c).
Fil: Monteros, Julio A.. Universidad Nacional de Salta. Consejo de Investigacion; Argentina. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina
Fil: Moya, Maria Cristina. Universidad Nacional de Salta. Consejo de Investigacion; Argentina. Universidad Nacional de Salta. Facultad de Ciencias Naturales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta; Argentina
description The aim of this contribution is to make known a graptolite assemblage from the Upper Tremadocian coming from the Mojotoro Range on the southeast part of the Argentine Eastern Cordillera (Figure 1a,b). The fossiliferous deposits correspond to the lower part of San Bernardo Formation (SBF) exposed on the hill of the same name, immediately to the east of Salta city (Figure 1b). The SBF outcrops along the park roadway up to San Bernardo; this route is one of the most important tourist attractions in the city of Salta, which assures a fast and easy access to the outcrops. The SBF is composed of silty shales, siltstones and fine– grained olive–green wackes deposited in a marine environment of transitional facies between the inshore and offshore shelf. Sandstone and conglomerate beds assigned to storm and gravity flow deposits are interbedded in the succession of shales and fine wackes. The SBF has been assigned an Arenigian age because it contains graptolites of this age (Loss, 1951) and typical trilobites belonging to the "Thysanopyge Fauna" (Harrington, 1957). The forms described by Loss (1951) include, among others, Clonograptus flexilis (Hall), Tetragraptus lavalensis (Ruedemann), T. sanbernardicus Loss, Didymograptus vacillans Tullberg, D. deflexus Elles and Wood, D. v–fractus Salter and D. nitidus (Hall). Later on, Moya et al. (1994) mention Pendeograptus fruticosus (Hall), Didymograptus cf. vacillans Tullberg and Schizograptus sp. An late Tremadocian age for the beginning of the SBF deposits has been proposed by Moya (1998) and thus could potentially record the Tremadocian–Arenigian boundary. The SBF belongs to the Santa Victoria Group (SVG; Upper Cambrian–Caradocian), which is composed of an alternating succession of sandstone and shale units (Figure 1c). The SVG overlies the Meson Group (Middle–Upper Cambrian) through a clear erosional disconformity (Figure 1c).
publishDate 2003
dc.date.none.fl_str_mv 2003
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/134882
Monteros, Julio A.; Moya, Maria Cristina; Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera; Instituto Superior de Correlación Geológica; Serie de Correlación Geológica; 18; 2003; 1-6
1514-4186
1666-9479
CONICET Digital
CONICET
url http://hdl.handle.net/11336/134882
identifier_str_mv Monteros, Julio A.; Moya, Maria Cristina; Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera; Instituto Superior de Correlación Geológica; Serie de Correlación Geológica; 18; 2003; 1-6
1514-4186
1666-9479
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://insugeo.org.ar/publicaciones/docs/scg_18/12.htm
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Instituto Superior de Correlación Geológica
publisher.none.fl_str_mv Instituto Superior de Correlación Geológica
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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