Vol, 58. | THE CRYSTALLINE LIMESTONES OF CEYLON. 405 
cleavage-faces were noted on the carbonate-crystals (Herimitigala). 
For a case of slickensided limestone, see below. 
In the field, the various bands of limestone crop out with consider- 
able regularity. Variations of dip are more frequent than changes 
of strike, which are always gradual, with one exception referred to 
below. It must be emphasized also, from this point of view, that 
the limestones cannot be considered apart from the granulites (Char- 
nockite Series in Ceylon), and that these do not appear to have 
suffered from earth-movements since their consolidation, so far as 
microscopic work and the greater part of my field-work go. 
In one case, however, a difficulty was met with in the field-work. 
On the Hakgala-Bandarawela road, near the 56th mile-post, the 
limestone strikes in a west-south-westerly direction; a furlong 
farther on the limestone is much slickensided and sheared (the only 
case observed by me in Ceylon), and in the stream just beyond this 
point the granulites are clearly seen striking in a north-westerly 
direction ; the limestone-boundary near by has the same direction. 
Appearances of shearing and crushing are found in the granulitic 
rocks south-west of this point also. ‘The areas north-east of it are 
somewhat inaccessible, being overgrown with lantana. Some 
uncertainty was felt also in mapping the area north of the Padi- 
nawela wood (Pl. XIV). Farther west, in the Mount-Olive 
area, limestones and granulites behave quite normally, possessing 
a common strike, a little north of west. A fault has been inserted 
in the map, in order to call attention to the existence of these 
phenomena ; but in all probability it does not represent accurately 
the state of affairs. 
It will be seen, from the maps which illustrate this paper, that 
the limestones and granulites together have probably been thrown 
into gentle folds ; work in the field, however, impresses one with 
the comparatively uniform structure of very considerable areas. 
III. Retarions BETWEEN THE CRYSTALLINE LIMESTONES AND 
THE CHARNOCKITE SERIES. 
With the exception of Mr. Parkinson’s description of a section 
near Matale, to be referred to later, no account has been given 
of these relations. As stated above, the limestones and granulitic 
(igneous) rocks exhibit a common foliation, the direction of which 
is parallel to the boundary between the two rocks. The junction is 
often very easy to follow on the ground, though not often clearly 
enough exposed for detailed examination. The actual boundary 
seems never, or very rarely, to be abrupt; but there is either a zone 
of green rocks in which greenish diopside is the most prominent 
constituent, other minerals including greenish and brown micas 
and amphibole, green spinel, iron-ores, and sometimes calcite— 
separating the limestones from the ordinary granulitic rocks,—or 
there is a gradual transition between the latter and the limestones, 
marked by the gradual appearance of calcite, accompanied by scapo- 
lite and sphene. 
Q.J.G.8. No. 231. 2F 
