FORAMINIFERAL BIOSTRATIGRAPHY AND PALECECOLOGY OF THE KALAMBAINA FORMATION, SOKOTO EMBAYMENT; NORTHWESTERN NIGERIA
FORAMINIFERAL BIOSTRATIGRAPHY AND PALECECOLOGY OF THE KALAMBAINA FORMATION, SOKOTO EMBAYMENT; NORTHWESTERN NIGERIA
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Date
1987-06
Authors
OBAJE, NUHU GEORGE
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Abstract
The Kalambaina Formation outcrops mainly in the central
portion of the Sokoto embankment. The Sokoto embankment forms
part of the southeastern flank of the cullender Basin which
covers an area of about 700,000 km2 in Mali, Niger and
Nigeria, and the Republic of Benin.
The mineralogical micro-faunas from the outcropping
Kalambaina Formation in the Sokoto embankment embankment are predominantly
calcareous with some carbonaceous taxa. The assemblages from all
the horizons in the sections comprise calcareous taxa with
porcelains to Aline wall structure and some carbonaceous
taxa with simple structure. Most of the species encountered
have previously been described and provided a useful data
base for regional and local paleontological, paleographic
and stratigraphic interpretations.
The mineralogical assemblages of the Kakalina Formation
are characterized by the dominance of local Paleocene species,
namely Elphidiella africana, and Operculinoides Bermudian,
followed by Rosalia Koenraad, Decides precursors, and
Paraphernalia clapper. Other strati graphically important
ramification identified and described include Onion
geranium, Rosalia of nonconformists, Antonella sp.,
Pyramidal crass, Promethium sublayer, Pleurostomella
Paleocene and Humanitarian amanuensis.
Mineralogical species diversity is twenty and this
is low enough to suggest shallow water marine environment
of deposition.
Description
A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, IN PARTIAL FULFILLMENT
OF THE REQUIREMENTS FOR THE AWARD OF THE DEGREE
OF MASTER OF SCIENCE (GEOLOGY)
Department of Geology
Faculty of Science
Ahmadu Bello University
Zaria
JULY, 1987
Keywords
FORAMINIFERAL,, BIOSTRATIGRAPHY,, PALECECOLOGY,, KALAMBAINA,, FORMATION,, SOKOTO,, EMBAYMENT;, NIGERIA