204 
IOWA ACADEMY OF SCIENCES. 
GYMNOSPERMiE. 
Conifers. 
Juniper as virginiana Linn. Red Cedar. 
Rare. Found on steep bluffs along North River and 
Cedar Creek. In Douglas Township there was a 
small grove on a rocky bluff, wherein the trees 
reached a foot or more in diameter. 
A TERRACE FORMATION IN THE TURKEY RIVER 
VALLEY, IN FAYETTE COUNTY, IOWA. 
BY G. E. FINCH. 
The Turkey River flows, in the lower part of its course, 
through the driftless area in Fayette county, through wide 
bottom lands. These are usually a half-mile, sometimes a 
mile or more in width, showing considerable progress in 
base-leveling. 
Fringing the bluffs on one or both sides of the river may 
usually be found a “ bench,” rising ten or twenty feet 
above the general level of the valley. A few rods north- 
west of the Huntsinger bridge over the Turkey River in 
Dover township, Fayette county, a small tributary called 
Dry Run, coming from the north, has cut into the side of 
one of these terraces from top to bottom, showing in a 
broad, concave curve, a section about 800 feet long and 
25 feet high. Several formations are exposed. Starting 
at bed rock and extending upward about three feet, is an 
iron-stained formation that seems to be residual. It is 
composed largely of cherty fragments from the lower part 
of the Maquoketa shales with a smaller mixture of green- 
stones and quartz pebbles, all imbedded in rusty earth. 
Above this occurs some eight feet of a loess-like material, 
merging into a soil at the top. Somewhat abruptly above 
this, the bank changes to thin-bedded sand and gravel 
strata for about four feet. Then occurs six feet of lime- 
stone fragments with a small percentage of glacial peb- 
bles, packed so close and even in horizontal layers as to 
