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A new Middle–Late Jurassic flora and hot spring chert deposit from the Deseado Massif, Santa Cruz province, Argentina

Published online by Cambridge University Press:  13 March 2007

ALAN CHANNING ,
ALBA B. ZAMUNER  and
ADOLFO ZÚÑIGA
ALAN CHANNING
Affiliation:
School of Earth, Ocean & Planetary Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3YE, UK
ALBA B. ZAMUNER
Affiliation:
Departamento de Paleobotánica, Facultad de Ciencias Naturales y Museo, UNLP, Paseo del Bosque s/n°, 1900 La Plata, Argentina
ADOLFO ZÚÑIGA
Affiliation:
Departamento de Paleobotánica, Facultad de Ciencias Naturales y Museo, UNLP, Paseo del Bosque s/n°, 1900 La Plata, Argentina
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Abstract

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We present an initial report of a well-preserved and relatively diverse Gondwanan plant assemblage from Bahía Laura Group, Chon Aike Formation strata of the Estancia Flecha Negra area, central-western region of the Deseado Massif, Santa Cruz province, Patagonia, Argentina. The locality contains the first richly fossiliferous chert with a diverse and well-preserved plant assemblage reported from the Mesozoic which is demonstrably associated with hot spring activity. A compression flora and petrified forest contained in associated clastic and volcaniclastic environments provide an indication of regional plant diversity during this as yet poorly represented stratigraphic interval.

Keywords

silicificationsinterepithermalpermineralizedpermineralisedpetrified
Type
Original Article
Information
Geological Magazine , Volume 144 , Issue 2 , March 2007 , pp. 401 - 411
Copyright
© 2007 Cambridge University Press