Record Details

'Trigonal' @iDiscocyclina@@ sp. from the Pondicherry formation, Pondicherry, South India

DRS at CSIR-National Institute of Oceanography

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Title 'Trigonal' @iDiscocyclina@@ sp. from the Pondicherry formation, Pondicherry, South India
 
Creator Setty, M.G.A.P.
 
Subject Geology and Geophysics
Oceanography and Limnology
Fossil Foraminifera
Micropalaeontology
Plankton
Limestone
Marine Transgressions
Neritic Province
Cretaceous
Palaeoecology
Discocyclina
ISW, India, Pondicherry
 
Description A rare and unusual type of 'trigonal' @iDiscocyclina@@ sp. is noticed in the uppermost Discocyclinid limestone and the Upper marlstone units of the Pondicherry formation (F horizon - Nerinea beds - of Pondicherry area). The faunal association of this species is chiefly planktonic, and transitional from the Discocyclinid limestone unit to the Upper marlstone unit, as seen by a lesser degree of abundance. The 'trigonal' shape of the test may be due either to specialisation or degeneration in the changed conditions of the regressive phase of the Cretaceous transgression in South India. The faunal assemblage indicates a middle to outer neritic environment
 
Date 2000-10-24T09:56:27Z
2017-09-29T13:47:25Z
2000-10-24T09:56:27Z
2017-09-29T13:47:25Z
1968
 
Type Book Chapter
 
Identifier Cretaceous-Tertiary Formations of South India. Bangalore:Geological Society of India; 1968; 130-135
http://drs.nio.org/drs/handle/2264/5993
 
Language en
 
Relation Mem Geol Soc India
Memoir-Geological Society of India, vol.2
Seminar on Cretaceous-Tertiary Formations of South India; 1968
NON-SCI
 
Publisher Bangalore: Geological Society of India