508 GOODMAN. 



comprised between Cotabato and Panguian Point, tlie most soutliern one of the 

 island, is at present undergoing subsidence, while, on the other hand, an upheaval 

 seems to be going on in the northeastern and Pacific coast of the island. Tlie 

 southwestern part of the epicentral region, especially the hills or low ranges 

 where the widest fissures were opened, may be considered as the junction between 

 the eastern ranges of Mindanao, running from Surigao to the San Agustin Cape, 

 and the central one, stretching from the Dinata and Sipaca Points in the north, 

 to Panguian Point in the south. All the rocks in this range, through which run 

 the Sahug and the Tubflan Rivers, are of madrepore and polypus of recent formation, 

 alternating with clay beds and limestone strata." 



MONCATO TO BDTUAN ON THE AGUSAN EIVER. 



The Agusan Eiver, just below the town of Moncayo, was reached on 

 the afternoon of February 10, the eleventh day after leaving Davao. The 

 river at this place had an average width of 41 meters and was about 1.6 

 meters deep at the time of our visit. There was a surface current aver- 

 aging 3.86 kilometers per hour, equivalent to a discharge of 64.5 cubic 

 meters per second. Moncayo consists of perhaps forty houses and is 

 inhabited by Ibabaos. 



The map of the river wliieli accompanies this report shows the town of 

 Moncayo to be situated on the right or east bank of the Agusan Eiver, about 

 134 kilometers south-southeast of Butuan. The actual distance to Butuan, as 

 measured along the course of the river, is approximately 250 kilometers. Our 

 bearings were obtained with a Brunton Pocket Transit, while the distances were 

 gauged by time. 



The party left Moncayo on the morning of Februaiy 13, iioating 

 downstream in a small boat. Fortimately we had the current of this 

 long river in our favor, otherwise, j)articularly during the period of high 

 waters in v\-hich we traveled, progress would have been extremely slow 

 and laborious. The banks are nearly everywhere 3 to 10 meters high and 

 as the valley of the Agusan is very wide and flat, observations could not 

 be obtained on peaks or mountains. 



San Rafael, a small barrio of the town of Jativa, was reached in the 

 afternoon. 



The people of San Rafael resemble closely the Ibabaos or Mandayas from 

 farther up the river, but they call themselves Agunitanos, which is probably a 

 local name, for we heard it nowhere else. They possess a corrugated iron-roofed 

 church, the first we had seen since leaving Davao, but this as well as all the other 

 buildings in the barrio is in a very dilapidated condition. The dwellings are 

 constructed more like the typical Filipino hut, and in place of the high, open- 

 walled houses with scaling poles leading up to them, such as are constructed 

 everywhere between the Sahug and this place, all, with only one exception, had nipa 

 walls and ordinarj-, short, bamboo ladders. 



The banks of the river between Moncayo and San Eafael consist almost 

 entirely of a clay shale lying practically horizontal. A bank of fossil- 

 iferous blue shale about 9 meters high exists at a place below the barrio of 

 Tagusap, on tlie west side of the river. The fossils which are all of recent 

 marine origin are extremely numerous and splendidly preserved. 



