60 STEPHEN TABER 
of Aurelius Station. They are strung out in a general north and 
south line near the bottom of a hill slope, and at the foot of the hill, 
close to the base of the domes, there are several large springs with 
deposits of calcareous tufa below them. A small quarry has been 
opened in one of the larger domes, which has a diameter of about 
50 m. and height of 4 m. 
Hartnagel* thinks that these domes are due to an increase in 
volume of the underlying beds, because of the formation of gypsum 
from anhydrite; but the present writer has found no evidence 
supporting this view. The shape of the domes, their location, and 
their general associations are such as to suggest that they have been 
formed in the same way as the salt and gypsum domes of Louisiana 
and elsewhere, which have been described and explained by Harris.’ 
No open fissures, except where joints had been widened at the sur- 
face by weathering, and no veins were observed in any of the domes. 
Open spaces of appreciable size are infrequent except in the 
upper beds of the Salina. The Bertie waterlime contains numerous 
small cavities attributed by Vanuxem to the solution of salt, since ~ 
they sometimes exhibit the hopper-shaped outlines of halite crystals. 
The intercalated layers of magnesian limestone in the Camillus 
shale usually show the same porous structure and hopper-shaped 
casts. These cavities are frequently lined with a calcareous deposit. 
Small cavities, caused by the partial solution of fossils, are occa- 
sionally found in some of the limestones, and these openings are 
often lined with calcite, chalcedony, or crystals of quartz. 
Open fissures of mechanical origin were found in only one 
locality, in Camillus shale exposed by a cut on the Lehigh Valley 
Railroad about 100 miles west of Cayuga Junction. The cracks are 
Icm. or more in width, and are partly filled with a calcareous 
deposit having the appearance of finely banded travertine or onyx 
marble, the layers of which are tinted various shades of light yellow 
and reddish brown. The material is similar in every way to the 
deposits lining cavities in the Bertie waterlime and to layers in 
tC. A. Hartnagel, ‘‘Preliminary Observations on the Cobleskill (‘Coralline’) 
Limestone of New York,” V.Y. State Museum Bull. 69, 1903, p. 1135- 
2G. D. Harris, ‘‘The Geological Occurrence of Rock Salt in Louisiana and East 
Texas,” Econ. Geol., IV (1909), 12-34. 
ing ei tie 
