Parana Basin

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Definition

The Paraná Basin (Portuguese: Bacia do Paraná, Spanish: Cuenca del Paraná) is a large cratonic sedimentary basin situated in the central-eastern part of South America. About 75% of its areal distribution occurs in Brazil, from Mato Grosso to Rio Grande do Sul states. The Paraná Basin covers an area of about 1,500,000 km2 (580,000 sq mi).

Introduction

The Paraná Basin stretches from the Brazilian state of Mato Grosso in the north to northern Argentina and Uruguay in the south. The southern portion in Uruguay is locally known as Norte Basin. The basin has an oval shape with the major axis N-S, its current boundary is defined by erosive limits related largely to the Mesozoic-Cenozoic tectonic history of the continent.

Basin Evolution

Sediments were deposited in the Paraná Basin during the Paleozoic and the Mesozoic Era (450-65 Ma), keeping record of nearly 400 million years of Phanerozoic history of this region of the world. The basin accumulated siliciclastic, chemical and volcaniclastic sediments, between the Neo-Ordovician and Late Cretaceous. Part of the accumulation time a was interspersed with depositional gaps that separate the various super sequences.