22 TRANSACTIONS OF THE [ocr, 28, 
Chazy is the classic locality for the rocks of the Chazy group. 
The village is built upon them, and outcrops containing char- 
acteristic fossils are to be found in almost every yard. The 
quarries in the village and southeast of it, and Little Chazy 
River, afford good sections. The best section of the Black River 
limestone was seen there. The section shows that this forma- 
tion may be split up into a number of zones, each characterized 
by its own peculiar faunula. From below upwards the horizons 
are marked; the lowest by a Leperditia, next a Strophomena, 
then follow Stromatocerium and Columnaria, Maclurea and 
Parastrophia. These horizons hold good for the Black River 
of that region. The Maclurea zone at the top of the Black 
River limestone is a most interesting find. Heretofore the large 
Maclurea has been known as characteristic of the middle Chazy 
beds only. At Chazy may be seen a zone six feet thick, at the 
top of the Black River, full of Maclureas. The species differs 
a little from the Maclurea magna as found on Crown Point. 
It is generally larger, but with a more impressed spire and with 
revolving lines on the sides and lower parts of the whorls. 
Isle La Motte is across Northwest Bay from Chazy Landing. 
Some good fossils were obtained there from the Chazy, Trenton 
and Utica. At Fisk’s Quarry handsome specimens of Stromato- 
cerium were seen in the Middle Chazy. Further southward, at 
Fleury’s Quarry, was seen a fine example of differential erosion 
along a joint plane. The Lower Chazy limestone is there made up 
of thin alternating layers of pureandimpure limestone. The pure 
limestone weathers more quickly, leaving the impure bands 
standing out in relief and exhibiting well the feature of cross 
bedding. Many trilobite remains were obtained in this quarry. 
On the eastern side of the island were found some good grapto- 
lites in Utica shale. The shale dipping to the east is exposed 
for a mile along the shore. The dip then quickly changes to 
westerly, and soon the shale is seen to have been dragged along 
the western side of a fault, with the Trenton limestone on the 
eastern side. Further northward this Trenton affords charac- 
teristic fossils. 
Highgate Springs, on Missiquoi Bay, was next visited. There 
the Cainbrian section was gone over, but few fossils were found. 
Back of the Franklin House is a series of parallel ridges. Those 
of Ordovician age yielded some satisfactory results. All beds 
from the Calciferous to the Upper Trenton are exposed on the 
two sides of a north and south anticline. Standing on the 
Calciferous sandstone which forms the crest of the anticline, the 
various beds from lowest to highest dip away on either side. 
The harder layers form prominent ridges in the fields. To the 
