Paleoflora de la Formación los Rastros (Triásico Medio), Provincia de San Juan, Argentina. Consideraciones Taxonómicas y Tafonómicas

Autor:	Alicia Isabel Lutz, Silvia Gnaedinger, Adriana Cecilia Mancuso, Alexandra Crisafulli
Rok vydání:	2011
Předmět:	Sedimentary depositional environment Paleontology Taphonomy Taxon biology Peltaspermales Taxonomy (biology) biology.organism_classification Incertae sedis Ecology Evolution Behavior and Systematics Equisetales Geology
Zdroj:	Ameghiniana. 48:568-588
ISSN:	1851-8044 0002-7014
DOI:	10.5710/amgh.v48i4(348)
Popis:	PALEOFLORA FROM THE LOS RASTROS FORMATION (MIDDLE TRIASSIC), SAN JUAN PROVINCE, ARGENTINA. TAXONOMIC AND TAPHONOMIC CONSIDERATIONS. The taxonomy and taphonomy of the paleoflora from the Los Rastros Formation (Middle Triassic) San Juan Province, Argentina, is described. The taphofloristic analysis is made considering five fosiliferous levels of sections from Quebrada Agua de la Pena and Quebrada del Leon. The described taxa belong to the Orders Equisetales, Osmundales, Corystospermales, Peltaspermales, Ginkgoales, Coniferales, and to the Pteridophylla group (incertae sedis leaves). Thirty one taxa are described, 19 of them recorded for the first time for the formation. Generic and specific diversity as well as taphonomic attributes were observed at the different beds studied thus allowing to characterize the depositional environment and the paleofloristic composition. The Los Rastros Formation is composed of several successive cycles of black shales, mudstones and sandstones, corresponding to a la...
Databáze:	OpenAIRE
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