﻿ASBESTOS AND MANGANESE DEPOSITS. 171 



few minutes walk of the sea, that Mr. F. D. Burdette has been at work 

 with a large force of native laborers. The geological relations obtaining 

 here are shown in the diagram below (fig. 17) : 



/Driifti j?7 

 Ljjjjestjni / 



Manganese / / / / / f 



s afest 



Limon.ee layer 

 ' ^j^^Vjfj''^ eruptive Condlomer^e 



Fig. 17. 



Not over 2 feet of concentrates were exposed at the time of the writer's 

 visit to this place; only after further work will it be ascertained whether 

 there is more than one bed of concentrates. If sufficient quantity of 

 this ore could be found it would be best to "riddle" it, afterward sack 

 it and transport it by means of eargadores or a cableway down to a 

 storehouse on the beach and from there it can be shipped during the 

 southwest monsoon. The lateral distribution seems to be sufficiently 

 extensive but at the time of my inspection I had some fear as to the 

 vertical extent of the deposits. Eecent development work has in some 

 measure shown this to be well grounded. 



Analysis of the manganese ore. 1 " 



Per cent. 

 SiO_, 1.10 



Fe,0. ; 4.04 



H.O— 110° ) ,_ 



P,0 5 .02 



MnO, 77.51 



93.25 

 Metallic Mn 48.93 



Apatite. 20 — Nothing very definite can be said about the occurrence of 

 this mineral at the present writing. Some fairly good crystals, sufficient 

 for making some important erystallographic measurements, were sent in 

 to us by Mr. Burdette over a year ago. These, in color and superficially 

 in crystal form, so closely resemble the mineral olivine that they were 

 at the time classed as such. Later it was found that they belonged to 



10 Analysis by Mr. L. A. Salinger, Chemical Division. Bureau of Science. 



20 This mineral was found near the trail to the "Thetford" workings at 

 Dalumat, but at the time I was there a landslide had concealed all traces of it. 

 TKis is the only place where Mr. Burdette has found it. 



