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54
GEOLOGY
[CH.
identical with those of Great Britain, and only one coral. We are justified in concluding, therefore, that the two Ordovician oceans remained separate from each other throughout Silurian times also. The southern extension of
Fig. 26. Fault Scarp at Pong Wo, Northern Shan States.
the Silurian ocean which covered the Shan States is not yet known.
The uppermost Silurian beds pass up into a great limestone system which has been termed the Plateau Limestone from the fact that it forms the great undulating
