Some Geological Problems — Calvin. 25* 
beds belonging to the succeeding formation. The cause of this 
disappearance is due to a steep downthrow fault with a dis- 
placement of over 3,000 feet, which passes between Mt. Stephen 
and Cathedral mountain, and on the opposite side of the valley 
cuts through the eastern shoulder of Mt, Field. Tlie beds of the 
Bow River group brought down to the surface by this fault, 
are arched up again a few hundred feet, by a second anticlinal, 
and are theu exposed for some distance along the base of Mt. 
Stephen, but' soon afterwards dip to the west and disappear for 
good about a mile east of Field. They are overlain and fol- 
lowed round the anticlinal by the dolomites, limestone and 
shales of the Castle Mountain group of which the upper and 
greater portion of the mountain consists. J 
No fossils have been detected so far in the lower part of the 
Bow River series, but specimens of Olenellns gilberti were 
found about 2,000 feet below the top of the formation by Dr. 
Dawson in 1884 The next fossiliferous zone in ascending 
order occurs near the junction of the Bow River and Castle 
Mountain groups, at which point specimens of Faradoxides and 
other fossils were found. Between three and four thousand 
feet farther up occurs the fauna described by Dr. Rominger. 
Higher up in the same formation, but some distance farther 
west, specimens of an Asaphus were found, above which come 
the graptolitic shales referred by professor Lapworth to the 
Utica-Trenton. 
Office of the Geological Survey of Canada, Dec. 1, 1888. 
SOME GEOLOGICAL PROBLEMS IN MUSCATINE COUNTY, 
IOWA, WITH SPECIAL REFERENCE TO THE RECTIFI- 
CATION OF THE SUPPOSED KINDERHOOK NEAR THE 
MOUTH OF PINE CREEK.* 
By S. Calvin. 
More than thirty years agof Prof. James Hall, then state 
geologist of Iowa, made a geological reconnaissance along the 
JA. section through mount Stephen and Cathedral mountain may be 
found in Part D, Annual report, Geol. Survey of Canada, 1886. 
♦Published simultaneously in the bulietia of the laboratories of natural 
history of the State of Iowa, vol. i, No. 1, 
tin the yeais 1855 and 185G. 
