PA11T 2 .] 
Theobald : Axial group in Western Prome. 
39 
mile north-west of Lepangaing where it seems to strike west-south-west. Three miles 
north-east of this spot is a large patch of limestone forming a low ridge, and two and 
a half miles south of the first locality is another large mass forming the summit of a hill. 
The relations of this limestone are not seen, but the ascent to it lies over typical upper 
axial grits and shales with a high dip east-by-north to east-north-east. These three out¬ 
crops are, I think, all disconnected portions of the same bed, the great disturbance of the 
beds hereabouts being probably produced by the presence of the groat serpentine mass of 
Bidoung hill six miles to the north-west. 
Six and a half miles south of Lepangaing, the limestone is again seen in the section 
above given, where it appears to he unusually thin and poorly developed, but thickens 
again to the south in the Pemyouk stream and on the ascent to Shue-doung, and in two 
or three places in the Made (Mudday) stream where it is much disturbed. 
(North of Nattoung, and about one and a half mile south-west from Thabiegaing, a 
limestone is seen on the crest of a low hill, very similar to, though differing from, any of the. 
beds in the neighbouring series. From this spot I obtained a single ill-preserved valve of 
a Jlalobia, which is very closely allied to, if not identical with, Halobia lommeli , as deter¬ 
mined by Dr. Stoliczka. This would indicate a triassie age for the rock in which it occurs, 
hut the relations of this could not he satisfactorily traced.) 
Still going south, the limestones referred to above occur at intervals, and display 
a distinct tendency to approach the boundary of the group. At one and a half mile south- 
south-east of Nioung-jadouk, it occurs on a hill top very close to the boundary, and still 
closer to it, above the village of Quienhla (Kwenghla) five miles west-south-west of Akouk- 
toung. In a word, as wo proceed south, the Nummulitic boundary outs back into the axial 
group, until a little below the parallel of Akonktoung the great and characteristic series of 
upper axials has almost entirely disappeared, very gradually certainly, from the oblique angle 
at which the boundary intersects the strike of the beds. The complete elision of this upper 
group to the south is well soon at Chinuagi (Kyeng-yua-gyco) three miles south-by-west 
from Quienhla. The stream above Chinuagi seems to display mostly shales of the lower 
group, and just south of the village in the bed of the stream highly altered sandstones come 
in of the usual harsh character of so many beds belonging to this portion of the group. 
Not thirty yards below them comes in quite unaltered a calcareous sandstone profusely 
charged with Nummulites. The boundary is here fixed within a few yards and strikes 
through the centre of Chinuagi village, and at this point would seem to completely cut out 
the whole upper group. 
Above the limestone occurs an enormous series of sandstones and shales, which in the 
section previously given, I haye sub-divided into small groups. The lowest of these (c) is 
over 1,300 feet in thickness, and contains a number of very characteristic beds, such as white 
freckled grits* and conglomerates, not usually very coarse, though nowand then coarse beds, 
almost breccias, are seen, and cream-colored argillaceous sandstones sub-poreeilanous, and 
sometimes offering a ‘lithographic’ look. Small white quartz pebbles abound in the liner 
conglomerates, but the coarser conglomerates are mainly composed of fragments of argilla¬ 
ceous subschistoso rocks which suggest the idea of their derivation from beds of the lower 
group. The coarsest bods I anywhere noticed occur in the Shu (Shoo) Ohoung above 
* My colldnKua, Jlr. Kedden, in describin'- these rocks in the Made valley, on the ascent lo Shuedoung and 
elsewhere, lian given emphasis to this peculiar charaotefid' while specie ling in some of these, beds by terming’ them 
‘a porphyry or altered grit.’ The term “porphyry” is of course inadmissible, though the beds often greatly 
resemble a porphyritic trachyte, and it is clearly to their external aspect only that Mr. Fedden refers when using 
the term. 
