Paraná Basin
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The Paraná Basin 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 remainder area is distributed in eastern Paraguay, northeastern Argentina and northern Uruguay. The shape of the depression is roughly elliptical and covers an area of about 1,500,000 km2 (580,000 sq mi).
Outline of the Paraná and Chaco-Paraná Basins
Fossil specimens of Glossopteris Flora from Paraná Basin coals, David White (1908).
Flood basalt outcrops, Serra Geral Formation, Iguaçu Falls, Brazil-Argentina border
Devonian
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The Devonian is a geologic period and system of the Paleozoic era during the Phanerozoic eon, spanning 60.3 million years from the end of the preceding Silurian period at 419.2 million years ago (Ma), to the beginning of the succeeding Carboniferous period at 358.9 Ma. It is named after Devon, South West England, where rocks from this period were first studied.
The rocks of Lummaton Quarry in Torquay in Devon played an early role in defining the Devonian Period
Diorama of a Devonian seafloor
Prototaxites milwaukeensis, a large fungus, initially thought to be a marine alga, from the Middle Devonian of Wisconsin
The Devonian Period marks the beginning of extensive land colonization by plants. With large land-dwelling herbivores not yet present, large forests grew and shaped the landscape.