Reassessment of Viséan miospore biostratigraphy in the Amazon Basin, northern Brazil
نویسندگان
چکیده
منابع مشابه
Two new species of Pseudancistrus (Siluriformes, Loricariidae) from the Amazon basin, northern Brazil
Two new species of Pseudancistrus, a genus diagnosed by non-evertible cheek plates and hypertrophied odontodes along the snout margin, are described from two drainages of the Brazilian Shield: Pseudancistruskayabi from the rio Teles Pires (rio Tapajós basin) and Pseudancistrusasurini from the rio Xingu. The new species are distinguished from congeners (Pseudancistrusbarbatus, Pseudancistruscora...
متن کاملCalcareous nannofossils biostratigraphy of the Campanian-Danian interval, Gurpi Formation in the Zagros Basin, SouthWest Iran
This study presents calcareous nannofossils biostratigraphy of the Campanian‒Danian interval at the Gurpi Formation in the southwest of Ilam Province, in the Zagros Basin. The studied sequence of the Gurpi Formation mainly consists of marly shale and limestones. The thickness of Gurpi Formation was measured as approximately 230 m. Forty-five species belonging to twenty-eight genera were recorde...
متن کاملDDT and its metabolites in breast milk from the Madeira River basin in the Amazon, Brazil.
Until the 1990s the 1,1,1-trichloro-bis-2,2'-(4chlorophenyl) ethane (DDT) was sprayed in the walls of the house along the Madeira River basin, Brazilian Amazon, a region well known for its large number of malaria cases. In 1910, Oswaldo Cruz described the presence of malaria in 100% of the population living in some localities from the Madeira River basin. Data available in the literature point ...
متن کاملCarbon isotope discrimination in forest and pasture ecosystems of the Amazon Basin, Brazil
[1] Our objective was to measure the stable carbon isotope composition of leaf tissue and CO2 released by respiration (dr), and to use this information as an estimate of changes in ecosystem isotopic discrimination that occur in response to seasonal and interannual changes in environmental conditions, and land-use change (forest-pasture conversion). We made measurements in primary forest and pa...
متن کاملSeasonal Behavior of Mercury Species in Waters and Sediments from the Negro River Basin, Amazon, Brazil
Espécies de mercúrio total (Hg T ), reativo (Hg R ) e orgânico (Hg ORG ) foram quantificadas em amostras de água não filtradas da Bacia do Rio Negro, Amazonia (de Janeiro/2002 a Janeiro/ 2004) em ambos corpos aquáticos de águas brancas e pretas. As águas pretas apresentaram as maiores concentrações de mercúrio total, orgânico e reativo (29,1; 1,63 e 3,9 ng L, respectivamente), sendo que as água...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Review of Palaeobotany and Palynology
سال: 1998
ISSN: 0034-6667
DOI: 10.1016/s0034-6667(98)00051-7