Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, Chile

We describe sixteen theropod dinosaur trackways from site III (Lower Cretaceous?) of the Quebrada Cha-carilla in the ChacariUa Formation (Jurassic-Lower Cretaceous), northern Chile. The trackbed belongs to a meandering river environment, with recurrent track assemblages. We find that the main direct...

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Autores principales:	Rubilar-Rogers,David, Moreno,Karen, Blanco,Nicolás, Calvo,Jorge O
Lenguaje:	English
Publicado:	Servicio Nacional de Geología y Minería (SERNAGEOMIN) 2008
Materias:	Large theropod Behaviour Synchronized walking Footprints Ichnites Lower Cretaceous Northern Chile
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082008000100009
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spelling	oai:scielo:S0716-020820080001000092008-04-10Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, ChileRubilar-Rogers,DavidMoreno,KarenBlanco,NicolásCalvo,Jorge O Large theropod Behaviour Synchronized walking Footprints Ichnites Lower Cretaceous Northern Chile We describe sixteen theropod dinosaur trackways from site III (Lower Cretaceous?) of the Quebrada Cha-carilla in the ChacariUa Formation (Jurassic-Lower Cretaceous), northern Chile. The trackbed belongs to a meandering river environment, with recurrent track assemblages. We find that the main direction of the ichnites from site III parallels that of water flow. Two theropod footprint morphotypes are recognized: A) digit II and IV occupying about 0.5 times the total footprint length, and B) digit II and IV occupying less than 0.35 times the total footprint length. We estimate similar speed (~7 km/h) for the two parallel theropod trackways of morphotype A, suggesting synchronized walking. We also describe some of the largest theropod footprints from South America (>60 cm), which are all of morphotype Binfo:eu-repo/semantics/openAccessServicio Nacional de Geología y Minería (SERNAGEOMIN)Revista geológica de Chile v.35 n.1 20082008-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082008000100009en10.4067/S0716-02082008000100009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Large theropod Behaviour Synchronized walking Footprints Ichnites Lower Cretaceous Northern Chile
spellingShingle	Large theropod Behaviour Synchronized walking Footprints Ichnites Lower Cretaceous Northern Chile Rubilar-Rogers,David Moreno,Karen Blanco,Nicolás Calvo,Jorge O Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, Chile
description	We describe sixteen theropod dinosaur trackways from site III (Lower Cretaceous?) of the Quebrada Cha-carilla in the ChacariUa Formation (Jurassic-Lower Cretaceous), northern Chile. The trackbed belongs to a meandering river environment, with recurrent track assemblages. We find that the main direction of the ichnites from site III parallels that of water flow. Two theropod footprint morphotypes are recognized: A) digit II and IV occupying about 0.5 times the total footprint length, and B) digit II and IV occupying less than 0.35 times the total footprint length. We estimate similar speed (~7 km/h) for the two parallel theropod trackways of morphotype A, suggesting synchronized walking. We also describe some of the largest theropod footprints from South America (>60 cm), which are all of morphotype B
author	Rubilar-Rogers,David Moreno,Karen Blanco,Nicolás Calvo,Jorge O
author_facet	Rubilar-Rogers,David Moreno,Karen Blanco,Nicolás Calvo,Jorge O
author_sort	Rubilar-Rogers,David
title	Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, Chile
title_short	Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, Chile
title_full	Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, Chile
title_fullStr	Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, Chile
title_full_unstemmed	Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, Chile
title_sort	theropod dinosaur trackways from the lower cretaceous of the chacarilla formation, chile
publisher	Servicio Nacional de Geología y Minería (SERNAGEOMIN)
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-02082008000100009
work_keys_str_mv	AT rubilarrogersdavid theropoddinosaurtrackwaysfromthelowercretaceousofthechacarillaformationchile AT morenokaren theropoddinosaurtrackwaysfromthelowercretaceousofthechacarillaformationchile AT blanconicolas theropoddinosaurtrackwaysfromthelowercretaceousofthechacarillaformationchile AT calvojorgeo theropoddinosaurtrackwaysfromthelowercretaceousofthechacarillaformationchile
_version_	1718439443189202944

Theropod Dinosaur Trackways from the Lower Cretaceous of the Chacarilla Formation, Chile

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