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Vol. 58. ] THE CRYSTALLINE LIMESTONES OF CEYLON. 
Lad 
25. The CrysTattine Limesronzs of Ceyton. By Awnanpa K. 
CoomdraswAmy, Esq., B.Sc., F.L.8., F.G.S. (Read March 
12th, 1902.) 
[Puatus XIII & XIV.} 
ConTENTs. 
Page 
MPEN GE GOUICLION YS Secret |< sons ities = vanwine das Someisea ee ecemeanne rane eansespoee eames 3u9 
ET. General Description of the Limestones ..............000sseceeeveerececees 402 
TIT. Relations between the Crystalline Limestones and the Charnockite 
SORTOS sad eae hesaaicciant « Manin de Jina wsie mvc ewan pommmnm cede otter chee anne mee en 405 
ye Intererowths of Calcite amd Dolomite 2. cscs sesh santas oaiieneiae 411 
V. Notes on the Accessory and Contact-Minerals ............... cesceeeeees 414 
1. Inrropucrion. 
In 1860 Baron Ferdinand von Richthofen’ recorded the occurrence 
of limestones in Ceylon. He observed the intimate associations of 
‘gneiss’ and granular limestone, and the transitions between the 
two. 
Mr. A. C. Dixon’ has given a short account of the beds of 
limestone as follows :—The 
‘beds run through the gneiss in a somewhat parallel direction, striking 
generally north-west by north to north, and having various angles of dip, 
from 10° to 40°.’ 
He refers to five bands. 
‘The first is one which outcrops a few miles this side of Balangoda, and runs 
north-north-west, occurring again at Huuuwala. The second runs through 
Dolosbage and Maskeliya; probably the bed occurring at Bilhul Oya is con- 
tinuous with this. The third outcrops under the Great Western [Mountain | 
on the Great Western Estate, and is continuous to the north-north-west with 
the Wattegoda and Medakumbura dolomites, and probably also with the beds 
at Gampola and Kurunegala. A subsidiary bed—or it may be an outlier of 
this—occurs near the Pussellawa rest-house. The fourth bed outcrops largely 
at Wilson’s Bungalow, Glen Devon, Dumbara, and Matale. The fifth occurs 
in the Badulla District.’ (Op. cit. pp. 42-43.) 
I may say that the identity of these bands over such considerable 
distances requires confirmation. 
Under the name of cipolin, Prof. A. Lacroix’ has described 
some specimens of crystalline limestone from Ceylon, which form 
part of the De Bournon collection belonging to the Coliége de France 
and that of Leschenault de la Tour in the Muséum d’Histoire 
Naturelle, Paris. The specimens were chiefly collected 7 leagues 
east of Kandy among acid gneisses. ‘lhe minerals calcite, dolomite, 
blue apatite, phlogopite, spinel, pyrrhotine, and chondrodite were 
* ‘Bemerkungen iiber Ceylon’ Zeitschr. Deutsch. Geol. Gesellsch. vol. xii 
(1860) p. 523. 
* Journ. Roy. Asiat. Soc. Ceylon Branch, vol. vi (1880) p. 39. 
* ‘Contributions a l’Etude des Gneiss 4 Pyroxéne et des Roches a Wernerite,’ 
Bull. Soe. frang. Minéral. vol. xii (1889) pp. 336-44. 
