\ — A List or Sau wv.vk Miseries.—By J. S. Geikie. 
The following does not pretend to be a full or com¬ 
plete list of Sarawak minerals as the title might lead 
one to expect, but it is hoped that it may form a basis 
to which additions may be made from time to time. 
A paper entitled “The Distribution of Minerals in 
Sarawak” was published by the late Mr. A. H. Everett 
in the Journal of the Straits Branch, Royal Asiatic 
Society in 1878 and a list of minerals is given by the 
State Geologist of the F. M. S. in his report on a visit 
to Sarawak in 1904, and these, with a few scattered re¬ 
ferences in the various books of travel written about 
the country, appear to be the only literature on the 
subject. 
Before treating of the distribution of the various 
minerals, it will be as well to note briefly the main 
features of the geological historic of the country. The 
most ancient identified rocks are the Jurassic Lime¬ 
stones whose rugged and precipitous outlines form such 
a prominent feature in the scenery of the country. 
Overlying this limestone is the series of Shales, Sand¬ 
stones and Conglomerates, which occur over the greater 
part of the territory of Sarawak; these in turn are 
covered by more recent Clay beds and deposits of 
Alluvial origin. 
All the stratified rocks show evidence of considerable 
earth movement, the bedding in places being much 
folded, disturbed and faulted, and the rocks themselves 
are somewhat metamorphosed—Jasperoid Rocks and 
Quartzites replacing the Shales and Sandstones, and 
Limestone being sometimes altered to marble. 
Numerous intrusions of Granite, Diorite, Porphyry 
and other Igneous Rocks are found cutting these 
sedimentary beds in every direction. 
Of the minerals which have been observed, it is but 
natural that the great majority are noted as occurring in 
the metaliferous districts of Upper Sarawak in which 
