The occurrence of microdiamonds in Mesoproterozoic Chapada Diamantina intrusive rocks: Bahia / Brazil
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منابع مشابه
The occurrence of microdiamonds in Mesoproterozoic Chapada Diamantina intrusive rocks--Bahia/Brazil.
The origin of diamonds from Serra do Espinhaço in Diamantina region (State of Minas Gerais) and in Chapada Diamantina, Lençóis region (State of Bahia) remains uncertain, even taking into account the ample research carried out during the last decades. The lack of typical satellite minerals in both districts makes a kimberlitic source for these diamonds uncertain. In mid 18th century the occurren...
متن کاملFirst pollen survey of murundus in the Chapada Diamantina region of the state of Bahia, Brazil
This was a pollen survey, in which we analyzed the sediments and moss polsters of murundus (termite mounds) in the Chapada Diamantina region of the state of Bahia, Brazil. Palynological treatment revealed the presence of 53 pollen types in murundus sediments, of which 23 were related to plants in the semi-arid zone and 30 remained unidentified. In moss polster samples, the pollen assemblage com...
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Taxonomically, blackflies (Simuliidae) are among the best-known aquatic insects in Brazil. However, information on their distribution is lacking for many regions. We sampled simuliids in 50 streams in the Chapada Diamantina region, State of Bahia, located in three distinct geographical areas, 20 at Lençóis, 18 at Mucugê, and 12 at Rio de Contas. We analyzed simuliid species richness and distrib...
متن کاملMale sleeping aggregation of multiple Eucerini bee genera (Hymenoptera: Apidae) in Chapada Diamantina, Bahia, Brazil
Males of some groups of bees have to find a place outside the nests to sleep, sometimes forming "male sleeping aggregations". Here we report the first record of "dense" male sleeping aggregation of two different genera of Eucerini bees observed in Bahia, Brazil. We discuss the possible aim of this kind of aggregation as well the plant utilized on aggregate.
متن کاملTwo new species of Lachesilla in the andra group, from the Chapada Diamantina, Bahia, Brazil (Psocodea: 'Psocoptera': Lachesillidae).
Two new species of Lachesilla in the andra group are described from Brazil, where the group was previously unknown. They raise to five the number of species in the group known in South America. An identification key for females of the andra group in South America is included.
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ژورنال
عنوان ژورنال: Anais da Academia Brasileira de Ciências
سال: 2007
ISSN: 0001-3765
DOI: 10.1590/s0001-37652007000200013