CICYTTP 12500
CENTRO DE INVESTIGACION CIENTIFICA Y DE TRANSFERENCIA TECNOLOGICA A LA PRODUCCION
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
New fossils record from Uruguay basin related to El Palmar Formation floristic composition.
Autor/es:
BREA, M. Y ZUCOL, A.F.
Lugar:
Corrientes
Reunión:
Otro; Reunión de comunicaciones APA; 2007
Institución organizadora:
APArg
Resumen:
El Palmar Formation is a fluvial unit d eposited during the Middle Pleistocene that the probably belongs to the Last Interglacial(IS5),an intervalconsidered themosthumidand warmoftheMiddlePleistocene.Thesedeposits(TL dated
80,670± 13,420 years SP) are found in outcrops along the western m. ruin of the ruguay River, between th Mo oretaRivera nd onccpciondel Uruguaycity.Theprofileismainlycomposed ofmedium,reddishandyellowish sand.Lensesof grovelandpebbles,dozensofmeterslong upto2m thick, areinterspersedinquartzosesandmass. he coarse trac tions arccomposedof chalcedony.Insectorslateralto these conglomeratelenses,thepresenceof medium to thicksandstonewithplanarstratification richinfossil woodsremainsisfrequent.The phytolith assemblageswerepresentedthrough
outthe profile. Inthiscontributionfournewmorphotaxaarcproposedonthebasisof newmaterial fromthesesediments.Thesefossils wereassignedtotheAnacardiaceaeandFab accac.Thefloristiccompo itonofthe EI Palmar Formation is integrated by Anacardiaceae, Fabaceae, Arecaceae, Lauraceat', Combret,ceae, Myrtaceae, Poaceae, Cyperaceaeand Podostomaceae. ThereClHlstructionofthe vegetation based onpaleobotanicalrecordsand se dimentary
deposits indicated a warm-temperate and humid to subh umid climJtl'. The palaeovegetation would have co mformed subtropical dry forests d ominated by Anacardiac ' iH' and Fabaceae, subtropical humid mixed io re st~ and pal m savanna.
