BENTHIC FORAMINIFERA AS BIOSTRATIGRAPHIC INDICATORS ON UPPER QUATERNARY OF CAMPOS BASIN

被引：5
|
作者：
Barbosa, Valquiria Porfirio [1 ]
机构：
[1] CENPES, Fundacao Gorceix, BR-21941915 Rio De Janeiro, Brazil
来源：
REVISTA BRASILEIRA DE PALEONTOLOGIA | 2010年 / 13卷 / 02期
关键词：
benthic foraminifera; biostratigraphy; upper Quaternary; Campos Basin; SURFACE OCEAN PRODUCTIVITY; LAST GLACIAL CYCLE; DEEP-SEA SEDIMENTS; SOUTH-ATLANTIC; INDIAN-OCEAN; ECOLOGICAL IMPLICATIONS; EQUATORIAL PACIFIC; WATER CIRCULATION; ASSEMBLAGES; BOTTOM;
D O I：
10.4072/rbp.2010.2.06
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
BENTHIC FORAMINIFERA AS BIOSTRATIGRAPHIC INDICATORS ON UPPER QUATERNARY OF CAMPOS BASIN. Benthic foraminifera are very useful as environmental indicators but provide less resolution concerning the biostratigraphy due to their usual long ranges. Nevertheless, there is a general consensus that the ecological sensibility of particular bathyal assemblages is an important framework to the time constraint. This study aims the proposition of a biostratigraphic zonation to the Upper Quaternary of Campos Basin, using the distribution and frequency patterns of benthic foraminifera as indicators of the major paleoclimatic events related to the glacial and interglacial stages of the last Quaternary glacial cycle. For this purpose, 64 samples from two piston cores drilled on the continental slope of Campos Basin, southwestern Brazil were analyzed. Three benthic biozones were recognized: Cibicidoides pachyderma, Nonionella auris and Gyroidinoides nitidula, which show a good correlation between studied cores and with the international ecozones X, Y and Z.
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收藏
页码：129 / 142
页数：14
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