— 117 — 
Immediately beneath the coal at the bottom of the shaft is a blake 
conglomerate filled with quartz and other pebbles. 
A dike of eruptive rock cuts through the coal nearly vertically, 
a}out 50 meters west from the bottom of the shaft, known as Poco Fé. 
It is about 3 meters wide and runs nearly north and south. It has been 
traced in the mine for 400 meters, and the coal has been partially coked 
and much disturbed for 3 to 4 meters along the line of contact.Toward 
the southern portion of the mine, the dike separates first into two divi- 
sions and then into three. Dr. Geo P. P. Merrill, of the National 
Museum, Washington, D. C., to whom specimensof the dike rock were 
submitted for examination, thinks the dike is more andesitic in its 
mineral nature than basaltic. (See his remarks concerning it on 
another page.) 
Two other borings with the diamond drill in addition to the one 
whose record has already been given were made in the vicinity of Poco 
Fé, on the waters of Arroio dos Ratos, the records of which were kindly 
placed at the disposal of the Commission by Sr. Otto Spalding. One of 
these borings at the old shaft known as Poco Izabel, 900 meters distant 
from boring n. 2 already given, and beginning 25 meters higher, has 
the following record : 
Meters, 
Variegated clay. . 2. 2. 6. 6 8 © ee we ew ew ee we we 10.20 
Shales of different colors. . 2. 26 «© «© © © «© «© © © © «© « « 29,70 
COal SURG alee ra. deh a, Sia Sol ee rye Coe Cher ce Man cares Se Se 
Shal@ig oo ee Gove ee rs a ew eh we BD 
Coal (Treviso?). . . 2 « © «© «© «© « « 0.10 
Shale, dark... . eee: Benne: eo DESO 
Coal, S. Jeronymo, upper ‘anal, ot cas ie = 
Clay and shale. . .. . + . + 5.30; 7.00 
Coal, S. Jeronymo, lower ponete aoa el Oe ‘50! 
Shale, dark . . . . . . .. eh) 1510 
Shale, white. . . . . . .. 6... . 1.00 : . 
Shale, dark green. . . bree acd ace ae Ril Bonito Beds.s = 85.88 
Sandstone, dark green and lls Be i ee 0 
Shale, dark green, . . Soe Sow & oe 16.40 
Shale, arenaceous and ealessouie. i t+ Ghee ae EO) 
Coal ew WOR OR aS we Ce ww 006 
Shale, arenaceous . . . . . .. =... 4,50 
Coal . . . . en cs oo Gate e ne ce OZ 
Sandstone, alinty and eulbnteots, eo eg a 23790 
