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Geological Magazine; March 2007; v. 144; no. 2; p. 401-411; DOI: 10.1017/S0016756807003263
© 2007 Cambridge University Press (CUP)
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A new Middle–Late Jurassic flora and hot spring chert deposit from the Deseado Massif, Santa Cruz province, Argentina

ALAN CHANNING*,*, ALBA B. ZAMUNER{dagger} and ADOLFO ZÚÑIGA{dagger}

* School of Earth, Ocean & Planetary Sciences, Cardiff University, Main Building, Park Place, Cardiff, CF10 3YE, UK
{dagger} Departamento de Paleobotánica, Facultad de Ciencias Naturales y Museo, UNLP, Paseo del Bosque s/n°, 1900 La Plata, Argentina

* Author for correspondence: channinga{at}cardiff.ac.uk

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.

Key Words: silicification • sinter • epithermal • permineralized • permineralised • petrified




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D. M. Guido, A. Channing, K. A. Campbell, and A. Zamuner
Jurassic geothermal landscapes and fossil ecosystems at San Agustin, Patagonia, Argentina
Journal of the Geological Society, January 1, 2010; 167(1): 11 - 20.
[Abstract] [Full Text] [PDF]


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