20, 3 Schenck: Physiography and Geology of Samar 243 
all very small and delicate, so that specific determinations are 
impossible. on 
Not unlike the above specimens is the sandstone occurring at 
locality F866, in Catbalogan, at the lighthouse, where the beds 
are so folded as to form minor anticlines and synclines. The 
specimen is fairly hard, compact, fine-grained, bluish gray rock, 
weathering brown. Magnetite and feldspar crystals were rec- 
ognized among other subrounded grains. The fossils found in 
it were identified as Drillia sp. a., Dentalium, Nucula, and 
Nassa (?). 
.Across a small bay from locality F865 at Maolong Point, near 
the municipal rock quarry, about 3 kilometers north of Cat- 
balogan, are abundant outcrops. A rock from this locality near 
the water’s edge is calcareous, medium- to fine-grained, and 
contains larger fragments of pure limestone. In it are to be 
recognized some magnetite, angular fragments of feldspar, and 
bits of subangular olivine, although most of the grains are more 
or less rounded. It is a fine-grained limestone conglomerate. 
Exposed at this locality is a hard, coarse-grained, compact, brec- 
cialike rock, a coarse-grained limestone conglomerate. The 
specimen examined in the laboratory shows a rather unusual 
association of subrounded felsitic pebbles, fragments of mag- 
netite, quartz (with a small fleck of gold), fractured feldspar, 
and, much to my surprise, Lepidocyclina and Lithothamnium in 
the larger angular fragments of limestone. In the field no rec- 
ognition was made of the reworked nature of this formation, 
which was then considered to be Vigo (Miocene) in age. Here 
is, however, proof of a definite unconformity after Vigo time, 
and it further indicates that these beds on the beach are probably 
Pliocene in age. A soft, gray, medium-grained, foraminiferal 
rock is associated with these conglomerates at this place (F878). 
At the top of the rock-quarry hill, only a short distance above 
these rocks on the beach, is a compact, fairly hard, dirty white 
limestone, relatively free from impurities, which is distinctly 
 fossiliferous, as is shown by the presence of Lepidocyclina and 
Lithothamnium remains. This rock is, beyond doubt, Vigo. 
While in the field, we recognized that a fault had occurred here, 
but it was not until the laboratory study of the rocks had been 
made that the true significance of this fault was appreciated ; 
that is to say, that the bearing the fault had on the unconformity 
here was defined. : 
One of the calcareous strata that outcrops at Anas Point, 2 
kilometers northwest of Catbalogan, is a hard, compact, dark 
