Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

Girish Kumar Sharma ¹, Kozo Takahashi ²

Affiliations
1 Department of Geology, Kumaun University, Nainital - 263 002, IN
2 Departmenotf Earth and Planetary Sciences, Kyushu University, 33, Hakozaki, 6- 10- 1, Fukuoka, JP

Abstract

The paper presents a first comprehensive account of Pleistocene radiolarians from a Piston core KH94-4- AMR-2PC in the Antarctic continental margin of the Southern Ocean region. Seventy five well preserved radiolarians from the fifty four samples were identified. The study shows that the section lies in the Chi Zone. This zone is further subdivided into lower and upper Chi subzones on the basis of last appearance, consistent appearance and highest common appearance.Twenty five new species were encountered and described but they have not been formally named. Minor reworking is observed in the studied sequence.

Keywords

Pleistocene Radiolaria, Radiolarian Zone, Southern Ocean Region, Antarctica.

Full Text

     

Girish Kumar Sharma ¹, Jyoti Bora ¹

Affiliations
1 Department of Geology, Kumaun University, Nainital - 263 002, IN

Abstract

This paper presents a detailed record of radiolarian species from the Leg 119 Site 745 (sections 1H to 4H) in the southern ocean region. Forty five species were identified and illustrated from forty six samples. The taxonomy, two radiolarian zones namely NR1 and NR2, morphological variations and distribution of taxa have been made from these sections. Twelve new species are identified but they are not formally named. The study provides the detailed Antarctic Pleistocene radiolarian data, proposed the placement of NR1 and NR2 zonal boundary at a shallow depth of 6.63 mbsf and data is used for comparative studies with other parts of the Antarctic region.

Keywords

Pleistocene, Radiolaria, Biostratigraphy, Antarctic Region.

Full Text