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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/134882
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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 |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1842270134229532672 |
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13.13397 |