430 The Philippine Journal of Science 1923 



had been located, unknowingly, over the fault line was tipped over at a 

 considerable angle and partially wrecked and had to be abandoned. 



Many of the plateaulike areas in northern Luzon and especially many 

 of the benches in the valleys are due in part to fill as a consequence of 

 these enormous subsidences of the loose, saturated terrane. These slides 

 will not cease until the angle of repose for that kind of material is reached. 



The writer is in agreement with these views concerning the 

 hospital slide, which were expressed in the field by Doctor Smith 

 before the unconformity between the Baguio formation and the 

 underlying Malumbang was 'discovered. Since the limestones 

 at the foot of the Zigzag are now recognized as Malumbang- 

 Pliocene, and not Eocene as was previously suggested, this hypo- 

 thesis is still further strengthened. 



Science is greatly indebted to Father Francisco de P. Sanchez, 

 of Ateneo de Manila, for his efforts and care in collecting 

 paleontologic specimens in the vicinity of Baguio. Dr. W. D. 

 Smith and the writer had the privilege of studying Father San- 

 chez's collections on exhibition in the museum on Mount Mirador, 

 Baguio. Of particular interest in this collection was a flora ob- 

 tained from the Baguio formation, from Government Center 

 quarries, about 1.6 kilometers east of Mount Mirador. The 

 following species were identified for Father Sanchez by Mr. E. 

 D. Merrill, director of the Bureau of Science : 



Vaccinium cumingianum Vidal. Elseocarpus argentea Merr. 

 Cletkra lancifolia Turcz. Ardisia sp. 



Machilus sp. 



The specimens were obtained from the silicious facies of the 

 Baguio tuffs and, according to Mr. Merrill, the species are 

 essentially those of an upland flora (Plate 10, fig. 1). 



PLEISTOCENE 



Prominent stream terraces, much dissected, occur in the middle 

 course of Bued River. The coarse gravels of these terraces are 

 in places 6 to 9 meters thick, and they rest with marked ero- 

 sional unconformity upon the andesites and andesitic breccias 

 in that part of the canon 15 to 30 meters above the river. With 

 little doubt, these terraces register a rest period in the general 

 uplift of Pleistocene time, during which a fairly wide valley 

 bottom was developed. The terraces may correspond to a vague 

 secondary level in the upper Bued River region below the Ba- 



