Estudos sedimentológicos das formações Botucatu e Pirambóia na região de Santa Rita do Passa Quatro, SP

Abstract

Os estudos sedimentológicos realizados em 28 amostras de arenito tiveram por objetivo a caracterização, mediante parâmetros estatísticos de FOLK & WARD, das Formações Botucatu e Pirambóia, na folha de Santa RitJa do Passa Quatro. Os dados obtidos revelaram, para estas duas Formações, diferenças marcantes nos seus valores de grau de seleção e curtose, ao passo que a assimetria mostrou valores bastante próximos, Através da distribuição granulométrica das amostras, pode-se fazer uma cllassificação desses sedimentos, segundo SHEP.PARD, bem como construir os gráficos denominados Sedimentogramas, que contribuíram nas interpretações dos ambientes deposicionais das referidas Formações.

Spatial variability of hydraulic conductivity and solute transport parameters and their spatial correlations to soil properties

“…The mean annual temperature is 21.2 °C, having humid and hot summers and a dry winter, with an average annual rainfall of 1423 mm (Miranda et al, 2015). The parent material comprising Cenozoic sediments that cover the Botucatu Formation (Paraná Sedimentary Basin, São Bento Group), constituted by unconsolidated sands with the thickness ranging from 5 to 7 m and pebbles at the base, and are spread at all São Paulo interior region (Azevedo et al, 1981;Giacheti et al, 1993). The action of weathering under tropical conditions makes the soil from the Cenozoic sediments highly lateritized (Giacheti et al, 1993).…”

Stochastic analysis of three-dimensional hydraulic conductivity upscaling in a heterogeneous tropical soil

“…The Botucatu Formation is covered by Cenozoic sediments, which are the parent material, constituted by unconsolidated sands with a thickness ranging from 5 m to 7 m and pebbles at the base [58,59]. The soil in this area is highly lateritized owing to the intensive tropical weathering of the parent material [59].…”

Stochastic upscaling of hydrodynamic dispersion and retardation factor in a physically and chemically heterogeneous tropical soil

“…Cenozoic sediments are the parental material of the studied soil and cover the Botucatu Formation. These sediments are constituted by unconsolidated sands with a thickness ranging from 5 m to 7 m, and can be found in the interior of São Paulo (Azevedo et al, 1981;Giacheti et al, 1993).…”