350 ADAMS. 



Gold Mines on Panaon Idand. — These mines were examined by Asli- 

 hurner in 1883. From a manuscript report in the possession of Ashbur- 

 ner's- clients, we have tlie following information given by Becker: 



"iSeveral veins of quartz outcrop on the coast and extend in a westerly direction 

 into the mountain. These veins are paralled. They strike east and dip south. 

 The wall rock is 'green-stone porphyry.' There is scjme wall rock in the vein 

 and the sulphurettes are generally pyrites and accompanied by galena and zinc 

 blende. One vein about six feet wide has been worked to a considerable e.Ktent. 

 some 871 tons having been treated up to 1883. The yield was .$(i or .$7 per ton. 

 Concessions for gold mining liave been granted at Tigbuan, just south of Pinntan. 

 and, according to the Compendio de Geogralia, tlicre was a productive mine at 

 Inalinan." 



Becker further says that Ashburner found nothing which he could 

 recommend to his clients. However, a mine which at that time was not 

 attractive to capitalists, may prove worthy of exploitation when the condi- 

 tions of the country are. favorable to mining. 



NOETHEASTERN SEMIMOUNTAINOUS DI8T1UCT. 



There is an elongate mountainous area to the west of the straits which 

 separate Leyte and Samar Islands, in which the highest elevations are 

 toward the northern end. There are some broken ridges on the east 

 and west of the mountains, and to the south are isolated hills forming 

 a contimtation of the district. The rugged portion is heavily timbered 

 and but sparsely inhabited. 



From Tacloban, the principal port of Leyte. the road to the interior 

 makes a detour of this district, tirst running to the south along the coast 

 to the town of Palo, where it branches to the northeastern plains. South 

 of Palo there are a few scattered hills situated near the coast and having 

 their flanks partly buried by the sediments which constitute the plain. 



Geologic formation. — The only note concerning the rocks of this district 

 is by Jagor, who reported that he found a cliU of grayish green quartzose 

 chloritic schists on the sandy beach about a league from Tanauan. This 

 locality is evidently to the south of Tanauan about half way to Tolosa 

 where there is such an exposure. Inland, in a long hill which the road 

 touches in two places, this schist is more fully represented and is cut 

 by dikes and larger intrusions of an augite andesite porphyry wliich 

 probably produced the schist by metamorphosing the sedimentaries with 

 which it came in contact. 



Further soutli on the seasliore, just to the northeast of Tolosa. there 

 is a high subconical hill surmounted liy an old tower built as an outlook 

 and defense against the Moros. An exposure of rock in a sea cliff of a 

 neighboring lower hill to the northeast shows an altered shale much 

 squeezed and slickensided. Between Tolosa and Dulag there is a hill 

 in which exposures near the road show a fine igneous rm-k wliicli on 

 microscopic examination proved to be felsitic andesite. 



