Amethyst geodes in the basaltic flow from Triz quarry at Ametista do Sul (Rio Grande do Sul, Brazil): magmatic source of silica for the amethyst crystallizations

Amethyst-bearing lava flows in the Paraná Basin (Rio Grande do Sul, Brazil): cooling, vesiculation and formation of the geodic cavities

D/H and 18 O/ 16 O Ratios in Waters Contained in Geodes from the Basaltic Province of Rio Grande do Sul, Brazil

Hepaticites iporangae Ricardi-Branco, Faria, Jasper, and Guerra-Sommer, 2011 from the early Permian of the Paraná Basin, Brazil, is not a liverwort but a tracheophyte

Hepaticites iporangae n. sp., Rio Bonito Formation, Early Permian (Sakmarian), Paraná Basin, Brazil, Western Gondwana

Vermiculite, with hydroxy-aluminium interlayer, and kaolinite formation in a subtropical sandy soil from south Brazil

The structure of nekoite, Ca 3 Si 6 O 15 ·7H 2 O, a new type of sheet silicate

Geochemical and scintillometric characterization and correlation of amethyst geode-bearing Paraná lavas from the Quaraí and Los Catalanes districts, Brazil and Uruguay

New material of Procolophon (Parareptilia: Procolophonoidea) from the Lower Triassic of Brazil, with remarks on the ages of the Sanga do Cabral and Buena Vista formations of South America

A new stratigraphic framework built on U-Pb single-zircon TIMS ages and implications for the timing of the penultimate icehouse (Paraná Basin, Brazil)

MICROBE-MEDIATED PRESERVATION OF INVERTEBRATE FECAL PELLETS: EVIDENCE FROM THE ICHNOFOSSIL PHYMATODERMA BURKEI , PERMIAN SHALLOW-MARINE, TERESINA FORMATION, SOUTHERN BRAZIL

FIRST REPORT OF FEEDING TRACES IN PERMIAN BOTRYCHIOPSIS LEAVES FROM WESTERN GONDWANA

Structural evolution and tectonic setting of the Porongos belt, southern Brazil

On ex situ Ophiomorpha and other burrow fragments from the Rio Grande do Sul Coastal Plain, Brazil: paleobiological and taphonomic remarks

Understanding ecosystem dynamics of herbaceous grasslands (Campos) and arboreal forests (Bambuseae) using Poaceae pollen grains in the Coastal Plains Holocene sediments of Southern Brazil

A-TYPE GRANITIC ROCKS IN POST-COLLISIONAL SETTINGS IN SOUTHERNMOST BRAZIL: THEIR CLASSIFICATION AND RELATIONSHIP WITH TECTONICS AND MAGMATIC SERIES

FIDELITY OF MOLLUSCAN ASSEMBLAGES FROM THE TOURO PASSO FORMATION (PLEISTOCENE–HOLOCENE), SOUTHERN BRAZIL: TAPHONOMY AS A TOOL FOR DISCOVERING NATURAL BASELINES FOR FRESHWATER COMMUNITIES

Late Paleozoic Ice-Age rhythmites in the southernmost Paraná Basin: A sedimentological and paleoenvironmental analysis

A MIDDLE PERMIAN (ROADIAN) LUNGFISH AESTIVATION BURROW FROM THE RIO DO RASTO FORMATION (PARANÁ BASIN, BRAZIL) AND ASSOCIATED U-Pb DATING

SPATIAL VARIATION IN THE TEMPORAL RESOLUTION OF SUBTROPICAL SHALLOW-WATER MOLLUSCAN DEATH ASSEMBLAGES