Aeolian Deposits
Mostrando 1-6 de 6 artigos, teses e dissertações.
-
1. Cordão Formation: loess deposits in the southern coastal plain of the state of Rio Grande do Sul, Brazil
ABSTRACT Loess consists of silt-dominated sediments that cover ~10% of the Earth's surface. In southern South America it occurs in Argentina, Bolivia, Paraguay and Uruguay, and its presence in southern Brazil was never studied in detail. Here is proposed a new lithostratigraphic unit, Cordão Formation, consisting of loess deposits in the southern Brazilian
An. Acad. Bras. Ciênc.. Publicado em: 2016-12
-
2. Structural constraints on Paraná basalt volcanism and their implications on agate geode mineralization (Salto do Jacuí, RS, Brazil)
The Paraná-Etendeka Continental Flood Basalt province hosts world-class agate and amethyst geode deposits in Rio Grande do Sul (Brazil; Serra Geral Fm.). Salto do Jacuí Mining District (Rio Grande do Sul, Brasil) has different types of agate geode hosted in vesicular basalt. A series of structural features has recently been investigated in the Salto do Jac
Publicado em: 2010
-
3. Gênese, distribuição e caracterização dos espongilitos do noroeste de Minas Gerais
This study relates to the spongillites deposits that occurs in shallow ponds on a karstic planation surface developed on rocks of the Neoproterozoic São Francisco Supergroup. Cenozoic siliciclastics sediments are related to this surface and Mesozoic Areado Group rocks occur adjacent to the deposits. Field studies associated with the analysis of multispectra
Publicado em: 2009
-
4. Caracterização geológica tridimensional e monitoramento de dunas no litoral oriental do Rio Grande do Norte
This work presents geophysical and geological results obtained in a dunefield located in the east coast of Rio Grande do Norte State, with the aim to recognize the aeolian body depositional geometries to a future geologic modeling of the aeolian petroliferous reservoirs. The research, which was done in blowouts region situated at Nisia Floresta Municipally,
Publicado em: 2006
-
5. Riscos e gestÃo ambiental no estuÃrio do Rio malcozinhado, Cascavel-CE
The Rio Malcozinhado lagoon-estuarine system is located in the Cascavel municipality, in the Cearà State Southeastern littoral 75km away from Fortaleza, Northeastern Brazil. Its 380 km2 hydrographic basin lies on basement rocks, Plio- Pleistocene Barreiras Formation sediments and Quaternary deposits. The urban expansion of the area in the last two decades w
Publicado em: 2003
-
6. Aeolian dust in Colorado Plateau soils: Nutrient inputs and recent change in source
Aeolian dust (windblown silt and clay) is an important component in arid-land ecosystems because it may contribute to soil formation and furnish essential nutrients. Few geologic surfaces, however, have been characterized with respect to dust-accumulation history and resultant nutrient enrichment. We have developed a combination of methods to identify the pr
The National Academy of Sciences.