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The Talamanca's orogenesis and the two last inter-glacial periods are the main factors that built the vast alluvial fans in the Talamanca's Pacific piedmont and where we discovered at least five correlative deposits. [ABSTRACT FROM AUTHOR]

This is a first analysis and description of the last two glaciations happened in the area of the Fabrega (Panama) and Pittier (Costa Rica) heights, in association with vegetation altitude changes. Also is done an analysis of the Pliocene volcanism of the sector and the morphology drawned by the glaciations. [ABSTRACT FROM AUTHOR]

A synthesis of the main physical shapes of the area of Bocas del Toro archipelago is made by the author, and in conclusion gives some recommendations for a permanent and sustainable regional planning. [ABSTRACT FROM AUTHOR]

Importants fluctuations of the lake of Nicaragua levels had been observed during the Quaternary. The lake appears to be a conjugated factors of the Rivas isthmus Quaternary orogenesis, the Nicaragua's grabben neotectonic and the arrival of sedimentary floods (fans) from the Central and Guanacaste volcanic ranges in Costa Rica: [ABSTRACT FROM AUTHOR]