64 PENNSYLVANIA A.ND NEW YORK DEVONIAN. [bull. 120. 
southern one on the western side of Mount Sheridan, 1 mile northwest 
of Phoenicia, and is uow worked by Mr. John D. McGrath. The back 
of the quarry in places is nearly 60 feet high, and a large amount of 
stone has been taken out. The good stone is the pinkish and bluish 
gray sandstone, but on the dump is a large amount of the bluish 
shale, which weathers to an olive color. In some of the rather arena- 
cious slabs were excellent specimens of Archccopteris obtusa Lx., in 
fact the best that have been found at any locality in the Oneonta or 
Catskill rocks. Sir William Dawson has expressed much interest in 
the photograph of one of the large specimens which is figured in this 
work (See PL 11, figs. b, c). In the more argillaceous shales were found a 
few pinnules of Archccopteris sphenophyllifolia Lx. ( ?). The quarry is 
about 370 feet above the railroad, or with an approximate altitude of 
1,170 feet A. T. 
Farther north, along the same ledge, is the Ryder quarry (1490 D2), 
with bluish-gray and pink sandstone. This quarry contains a rather 
prominent stratum of the "flint rock" of the quarrymen, which is the 
"pudding stone" that in this quarry contains a good many quartz 
pebbles in addition to those of clay. A little of this stratum was seen 
in the McGrath quarry, but the Ryder quarry does not show the 
plant-bearing stratum. 
NO. 1493 Al.— ALLABEN. 
Eisley quarry, which is not worked at present, is one-fourth of a 
mile southeast of Allaben, on the western side of the railroad. The 
lower part is massive bluish gray sandstone and the top red shale, 
containing plenty of fucoid (?) markings. The altitude of Allaben is 
990 feet, which is about that of the quarry. 
NO. 1492 Al.— BIG INDIAN. 
This quarry is near the summit of the hill, one-half mile north of the 
railroad station. The bed rock is a pink sandstone, above which is 
the bluish gray sandstone, a layer of the pebble rock, and some bluish 
shale. Specimens of Archccopteris are found in the shale. The quarry, 
which is not worked at present, is about the last one on the Ulster and 
Delaware Railroad until after passing the summit and approaching 
Griffin's Corners. The quarry is 550 feet above the railroad, which is 
1,209 feet A. T. at Big Indian, making the altitude of the quarry 
approximately 1,760 feet. 
Five miles beyond Big Indian and 41 miles from Rondout is the 
Grand Hotel station, where the summit of the railroad is reached at 
1,886 feet A. T. The ascent of the hill back of the Grand Hotel is 
made over strata of coarse gray sandstone, alternating witli red sand- 
stone and shale. The field on the summit, which is about 5Q5 feet 
above the railroad station, or, approximately, 2,150 feet A. T., is appar- 
