Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina

Herradurichnus Poiré and del Valle, 1996 from the Balcarce Formation (lower Paleozoic of the Tandilia System, Argentina) is an enigmatic ichnogenus previously considered as problematic. In this paper, Herradurichnus is revised and key material from collections is redescribed together with other spec...

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Autores principales:	Gutiérrez, C., Pazos, P.J., Fernández, D.E.
Formato:	JOUR
Materias:	Balcarce formation Gondwana Herradurichnus Ichnology Ichnotaxonomy Silurian bedding plane Cambrian fine grained sediment ichnology morphology outcrop paleocurrent quartzite sandstone taxonomy trilobite Argentina Balcarce Buenos Aires [Argentina] Tandilia Range
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_03757633_v56_n2_p_Gutierrez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_03757633_v56_n2_p_Gutierrez
record_format	dspace
spelling	todo:paper_03757633_v56_n2_p_Gutierrez2023-10-03T15:30:35Z Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina Gutiérrez, C. Pazos, P.J. Fernández, D.E. Balcarce formation Gondwana Herradurichnus Ichnology Ichnotaxonomy Silurian bedding plane Cambrian fine grained sediment Gondwana ichnology morphology outcrop paleocurrent quartzite sandstone Silurian taxonomy trilobite Argentina Balcarce Buenos Aires [Argentina] Tandilia Range Herradurichnus Poiré and del Valle, 1996 from the Balcarce Formation (lower Paleozoic of the Tandilia System, Argentina) is an enigmatic ichnogenus previously considered as problematic. In this paper, Herradurichnus is revised and key material from collections is redescribed together with other specimens documented in situ from outcrops and quarries. The diagnosis is emended to include its morphological variability. The revised Herradurichnus includes negative, epichnial, U-shaped, V-shaped and parabolic depressions. The specimens are horizontal, subhorizontal or oblique with respect to the bedding plane, and are recorded in fine-grained to very coarse-grained sandstones. Other characteristics are also described in detail. The holotype of Herradurichnus scagliai (Borrello, 1967) has been recovered. Material previously included in Crescentichnus Romano and Whyte, 2015 is now reassigned to Herradurichnus. Xiphosurans and trilobites are disregarded as possible tracemakers of Herradurichnus. The producers were able to construct structures oriented with the convex side of the arch in an opposite sense to the main paleocurrents. This ichnogenus is now reappraised and found to range from the Cambrian to the lower Silurian of Gondwana. © 2017, Mucchi Editori s.r.l. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03757633_v56_n2_p_Gutierrez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Balcarce formation Gondwana Herradurichnus Ichnology Ichnotaxonomy Silurian bedding plane Cambrian fine grained sediment Gondwana ichnology morphology outcrop paleocurrent quartzite sandstone Silurian taxonomy trilobite Argentina Balcarce Buenos Aires [Argentina] Tandilia Range
spellingShingle	Balcarce formation Gondwana Herradurichnus Ichnology Ichnotaxonomy Silurian bedding plane Cambrian fine grained sediment Gondwana ichnology morphology outcrop paleocurrent quartzite sandstone Silurian taxonomy trilobite Argentina Balcarce Buenos Aires [Argentina] Tandilia Range Gutiérrez, C. Pazos, P.J. Fernández, D.E. Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina
topic_facet	Balcarce formation Gondwana Herradurichnus Ichnology Ichnotaxonomy Silurian bedding plane Cambrian fine grained sediment Gondwana ichnology morphology outcrop paleocurrent quartzite sandstone Silurian taxonomy trilobite Argentina Balcarce Buenos Aires [Argentina] Tandilia Range
description	Herradurichnus Poiré and del Valle, 1996 from the Balcarce Formation (lower Paleozoic of the Tandilia System, Argentina) is an enigmatic ichnogenus previously considered as problematic. In this paper, Herradurichnus is revised and key material from collections is redescribed together with other specimens documented in situ from outcrops and quarries. The diagnosis is emended to include its morphological variability. The revised Herradurichnus includes negative, epichnial, U-shaped, V-shaped and parabolic depressions. The specimens are horizontal, subhorizontal or oblique with respect to the bedding plane, and are recorded in fine-grained to very coarse-grained sandstones. Other characteristics are also described in detail. The holotype of Herradurichnus scagliai (Borrello, 1967) has been recovered. Material previously included in Crescentichnus Romano and Whyte, 2015 is now reassigned to Herradurichnus. Xiphosurans and trilobites are disregarded as possible tracemakers of Herradurichnus. The producers were able to construct structures oriented with the convex side of the arch in an opposite sense to the main paleocurrents. This ichnogenus is now reappraised and found to range from the Cambrian to the lower Silurian of Gondwana. © 2017, Mucchi Editori s.r.l. All rights reserved.
format	JOUR
author	Gutiérrez, C. Pazos, P.J. Fernández, D.E.
author_facet	Gutiérrez, C. Pazos, P.J. Fernández, D.E.
author_sort	Gutiérrez, C.
title	Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina
title_short	Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina
title_full	Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina
title_fullStr	Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina
title_full_unstemmed	Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina
title_sort	analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of argentina
url	http://hdl.handle.net/20.500.12110/paper_03757633_v56_n2_p_Gutierrez
work_keys_str_mv	AT gutierrezc analysisoftheichnogenusherradurichnusinquartzitesofthebalcarceformationlowersilurianfromthetandiliasystemofargentina AT pazospj analysisoftheichnogenusherradurichnusinquartzitesofthebalcarceformationlowersilurianfromthetandiliasystemofargentina AT fernandezde analysisoftheichnogenusherradurichnusinquartzitesofthebalcarceformationlowersilurianfromthetandiliasystemofargentina
_version_	1782024546996453376

Analysis of the ichnogenus herradurichnus in quartzites of the balcarce formation (lower silurian) from the tandilia system of Argentina

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