— 3 — 
The coal bed, as may be observed has very much the structure 
shown at Capoeira and twoor three other points, the little «rider» bed 
being present as usual above the main coal, as well as the small 
seam which sometimes occurs at about the same distance below the 
main bed. Dr. Oliveira reports that about 3 meters of the coal is com- 
paratively pure. 
The only fossil plants observed in connection with the Bonito 
coal are some fragments of stems, and megaspores which Dr. David 
White thinks may be of Sigillarian origin. 
The Upper and Lower Bonito sandstone 
These are local names given to the two great sandstone ledges 
which in the region of Minas occur at short intervals above and 
below the Bonito coal. The Lower Bonito Sandstone is frequently 
pebbly, grayish-white in color somewhat feldspathic, always massive, 
and generally makes rapids and cascades in the streams. 
The Upper Bonito Sandstone is also quite massive, rather coarse, 
and also feldspathic, often having a yellowish-gray color, and like the 
lower one makes vercical cliffs around the hills and cascades in the 
streams. Neither of these beds has been identified beyond the region 
of Minas. 
Ponte Alta Coal 
In the exposures along the Estrada Nova, on above the locality 
of Bonito No. VI, and 18 meters higher (298.5 m.), a thin coal, 
20-25 centimeters in thickness, crops for several meters. Its vertical 
interval above the Bonito coal is less than 18 meters, however, since 
the strata rise rapidly betwean its crop and that of the Bonito coal. 
Its horizon is about 2 meters above the Upper Bonito Sandstone. 
About 8 kilometers nearly due south from Minas station, a coal 
bed has heen exploited to a small extent on a little stream tributary 
to Rio Ponte Alta which is supposed to belong at the same horizon 
as the little coal on Estrada Nova, and hence the bed has )ean desi- 
enated the Ponte Alta coal. It has the following structure in the 
section at its type locality near Rio Ponte Alta: 
Meters 
1. Sandstone, coarse, gray, massive . . . 2 6 6 6 ee ew 9.14 
2. Shale. Sed: Uc WG Boxe Bow soe. BU005 
5569 it 
