Arkell.1956.Jurassic..

BURMA AND WESTERN YUNNAN 4*7
It is from these thin limestone bands near the base of the Namyau
Beds that have been collected the many brachiopods and pelecypods
described respectively by Buckman (1918) and Reed (1931, 1936). Both
palaeontologists arrived independently at the conclusion that, although
more than one horizon may be present, all are Upper Bathonian. Buckman
based on the material a highly elaborate and detailed classification
of the Terebratulids and Rhynchonellids. Reed (1936) had collections
from two successive horizons, but both are Bathonian. The higher
contains elements of the Upper Bathonian shelly beds familiar in East
Africa, Arabia and Sinai: Gryphaea balli Stefanini, G. cf. costellata
Douville, Eligmus cf. rollandi Douville, E. cf. polytypus Eudes-Desl.,
E. cf. weiri Cox, with more than 20 other pelecypods, largely of familiar
European Bathonian species. The lower horizon contains at least 35
species, among them new species of the genus Eomiodon, which is found
in the Kuar Bet Beds of Cutch and in the Great Oolite of NW. Europe
and England.
The overlying red sandstones and Namyau Shales have not yet yielded
fossils but they are probably Cretaceous. Coal Measures near Kalaw in
the Southern Shan States have yielded a flora comparable to that of
the 'Umia' [i.e. Bhuj] plant-beds and Rajmahal Gondwanas, now known
to be Cretaceous (see p. 387), and associated red beds near Kalaw contain
Upper Cretaceous ammonites (Fox, 1930). This makes it more likely
that patches of red sandstones and conglomerates near Amherst and in the
Mergui district in the extreme south of Burma (latitude 12 0
N.), which
have been tentatively assigned to the Jurassic (Chhibber, 1934, pp. 200-
203), are really Cretaceous.
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