340 The American Geologist. May, 1893 
1565. Dark grey slightly calcareous thin-bedded shale, holding a few 
foraminifera, and fragments of fish remains. A considerable 
flow of water was here struck and rose to within 200 feet of the 
surface. 
1570. Dark grey non-calcareous thin-bedded shale, without organic re- 
mains. 
1575. Dark grey clay shale, with many fragments of the shells of 
Inoceramus. With these are a few species of foraminifera of 
such genera as Textularia, Anomalimi, etc., with fragmentary 
fish remains, and moderately large masses of pyrite. This gritty 
or fragmental layer formed the sandstone of the driller, and from 
it quite a large supply of water rose in the casing. 
1580-1590. Dark grey clay shale, with a few corroded prisms of Inocera- 
mus, small foraminifera, and fragments of fish remains. When 
the drillings are washed almost everything is carried away in the 
water as a fine mud. The latter specimen, when drying, became 
covered with a white efflorescence of sulphate of soda? 
1595. Similar shale, breaking down into thin flakes, and containing 
small cubical crystals of pyrite, prisms of Inoceramus, fragments 
of fish remains, and pieces of the shell of Ostrea, but no recogniz- 
able foraminifera. 
No. 15. — Consists throughout, as far as could be determined 
from the specimens, of a dark grey, non-calcareous cla}^ shale. In 
its upper portion it is appjR-ently very bituminous, and breaks 
into minute flakes, while below it is somewhat lighter in color, is 
often harder, and contains minute angular grains of clear quartz 
sand. 
The following is a more detailed categorical description of the 
beds passed through: — 
1600. Dark grey and rather hard fissile clay shale, brought up in frag- 
ments, some of which are more than an inch and a half in great- 
est diameter. It is quite free from calcareous matter, and under 
the microscope shows no traces of organic remains, but a few 
globules of pyrite may be seen. 
1605-1630. Soft, darkgrey, unctuous, non-calcareous clay shale, breaking 
into thin, scaly flakes. No trace of organic remains. 
1620-1645. Similar shale, with minute fragments of fish remains. 
1655. Similar shale with traces of pyrite, mixed with a few particles of 
fine white soft sandstone, possibly adventitious. The specimen 
as returned was composed almost entirely of a soft, impalpable 
clay, and the fragments of shale, etc., were procured by washing 
a considerable quantity. 
1660. Soft, dark grey, fissile, non-calcareous shale, with a few minute 
fragments of fish remains, and pieces of concretionary nodules of 
limestone, and crystalline masses of pyrite. 
