SS 
{Coaly shale. . . . 2... . 0.36 
4 Goa POH: w Se OS ee SRD age 
pare OLAYs: yp Oe ae He ae 
GOGl ae ot 1) te cee cat eh 0.53 
5 Clay, blue, visible. . . . 0.15 
It will be observed that the main bed has practically the same 
thickness and structure in this section as that shown at Bonito No. II, 
and hence they must be one and thesame seam, the difference of 
14.3 meters in elevation being due to proximity of a dike of diahase, 
the effect of which is generally to cause either a dislocation, or rapid 
dips in its immediate vicinity. 
Rio Bonito is about one kilometer due west from the locality 
of the exploration at Bonito II and there on the south bank of the 
stream occurs the following succession at Bonito III: 
Meters 
1. Sandstone, massive, Upper Bonito. . . .......- i 15.24 
Secu How a oe ey Oe Ow Oe Oe 0. 25° | 
2. Coal, Bonito Rider . ae se ate a OL Sap As GS Sa 0.08) 0.43 
"coat i ‘ ae el os 0. 10) 
(Clay, light eaieasi ee ee ee 0. 
3. Clay. Coal, slaty. . . . 2 w 0.10 0,58 
ow, datk. « « » * «6 « « 0. is) 
4. Coal, Bonito, slaty . . eo BR: Bee ee UB ie 8 2.13 
5. Clay, dark, aud concealed. . . . et Bests 3.65 
6. Sandstone, massive, Lower Boniio, visible in ihe of Rio Santas 3 _ 
Elevation of coal, 226.2 meters, thus giving a dip of 11.4 meters 
in the kilometer west from Bonito No. Il. 
The Upper Bonito sandstone makes a great cliff along the banks 
of the stream at this point, while the Lower Bonito floors the bed of the 
river. The coal is much weathered, and slaty looking at its outcrop 
and passes helow water level about 100 meters above this point. 
The Bonito coal rises rapidly to the north-east from the locality 
of No. Il, and 200 meters N. 15° E. gets 18 meters above Rio Bonito, 
and is 12 meters higher than at no. III, or 238.2 meters above tide. 
Here, at the locality of Bonito 1V, the following succession is exposed : 
Meters 
1. Sandstone, massive, Upper Bonito. . . . . . . . » ee GLI 
(pay a. Sree Mage L- a a% ° 0. ae 
2, Coal, Bonito Rider. .\Shale. . . . . . »- ws. 0.08 0.46 
Wisin. Qiao Gon ae Tone) 
