330 The Philippine Journal of Science 1913 



lihi (fossil locality 67) have been studied; photographs of some 

 of the specimens appear on Plate IV. 



Fossils were found in the Canguinsa sandstone on Amuntay 

 Creek (affluent of Canguinsa River) at an elevation of 150 

 meters. Here the Canguinsa sandstone is about 160 meters 

 thick (see geological section, Table VII). The fossils were 

 found about 40 meters above the base of the formation in tough 

 jointed gray clay. They include : 



Fossils collected at locality 7. 

 Pecten fricatum Rv. -f Dosinia sp. indet. 



Pecten sp. Pleurotoma suturalis Gray (?) + 



Pecten senatorius Gmel. + 



The following fossils were collected from a clayey, blue sand- 

 stone in the base of the Canguinsa immediately above the Vigo 

 shale on the upper part of Tangob Creek, about 50 meters north- 

 east of the main occurrence of volcanic agglomerate shown on 

 the geologic map. 



Fossils collected at locality 12. 



Strombus canarium Linn. Pattalophyllia sp. 



Conus ornatissimus K. Mart. Septarea arenaria Lam. + 



Corbula socialis K. Mart. Mitra javana K. Mart. 



Cypraea erosa Linn. + Natica mantilla Linn. + 



Hindsia sp. Ranella sp. 

 Pleurotoma flavidula Lam. 



A microscopic section through a specimen of the limestone 

 occurring in the Canguinsa sandstone on Mount Maglihi (fossil 

 locality 67) showed it to be made up of fragments of sandstone, 

 quartz, and limestone in a calcareous cement and to contain 

 Foraminifera with lozenge-shaped cells, probably of the genus 

 Lepidocyclina. The limestone from Mount Morabi (fossil local- 

 ity 62) contains Cycloclypeus communis K. Martin, which repre- 

 sents the middle Miocene, and large lepidocyclinas some of which 

 are 45 millimeters in diameter and 5 millimeters broad in the 

 thickened central portion. Lepidocyclina richthofeni Smith was 

 identified among these. This species has been referred by Dou- 

 ville 13 to the lower Miocene. 



No definite age determinations can be made from the fossils 

 in the Canguinsa sandstone proper. The fossils in the included 

 limestone, however, are well known and have been used in cor- 

 relation by various authorities. From their presence it is con- 

 cluded that the Canguinsa 'sandstone should be placed in the 

 middle Miocene, extending, perhaps, into the lower Miocene. 



The Canguinsa sandstone occurs immediately above the prin- 



u Compt. rend. Soc. geol. de France (1909), 14, 130. 



