Africa
is not readily obvious, probably because some strips of the crust have
been lost during the long time that elapsed since the drifting began.
Madagascar appears to have lain contiguous to Tanganyika and Kenya with
which it has structural and stratigraphical similarities. The separation
of Madagascar from Africa was probably effected in Jurassic times as also
the separation of Australia. Geologically speaking Mada gascar, Ceylon
and South India afford resemblances. The presence of a series of rocks
of similar nature in these areas supports the suggestion that these areas
once formed part of one land mass.1
(2)
On the evidence of the very close affinities between the plants and animals
in Africa and India at a very remote period, Mr.R.D. Oldham concludes
that there was once a continuous stretch of dry land connecting South
Africa and India. In some deposits, he writes, found resting upon the
Karoo beds on the coast of Natal, 22 out of 35 species of Mollusca and
Echinodermata collected specifically identified are identical with forms
found in the cretaceous beds of Southern India, the majority being Trichinopoly
species. From the cretaceous rocks of Madagascar, six species of cretaceous
fossils were examined by Mr.R.B.Newton in 1899 of which three are also
found in the Ariyalr group (Southern India).
The South African beds are clearly coast or shallow water deposits, like
those of India. The great similarity of forms certainly suggests continuity
of coast line between the two regions, and thus supports the view that
the land connection between South Africa and India, already shown to have
existed in both the lower and upper Gondwana periods, was continued into
cretaceous times.2
(3)
In the chapter devoted to Migration and Distribution of Organisms Haeckel
in referring to the continual changing of the distribution of land and
water on the surface of the earth says The Indian Ocean formed a continent
which extended from the Sunda Islands along the southern coast of Asia
to the east coast
1.P.S.pp.6&7
2.C.T.S.I,Introduction,pp.XXiv&Xv
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