632 THE JOURNALVOLFNGEOLOGY, 
that the deposits at all the localities mentioned were laid down 
in the same body of water and at exactly the same time. 
The inter-glacial deposits on the Don, best shown at the 
brickworks owned by the Messrs. Taylor, were described a year 
ago,’ but will be referred to again, giving the results of a careful 
reinvestigation under better conditions. 
When it was examined in the preparation of the paper referred 
to, the quarry consisted of two parts, a lower one showing about 
forty feet of drift, including nearly three feet of till resting on 
Hudson River shale, twenty-five feet of stratified sand with one 
or two clay beds, and, above this, ten feet of stratified clay 
making red brick. A slope of grass extended from this part of the 
quarry for about one hundred yards to the upper portion, where 
about forty feet of stratified clay making buff brick were to be 
seen, the top of the exposure reaching almost to the level of the 
plain formed by the Iroquois beach of Spencer. The part cov- 
ered with grass was stated by the men at work in the quarry to 
consist of the same clay as that worked for buff. brick, and was 
included with the upper stratified clay in the section given. 
About a third of a mile northwest of the quarry, the Davenport 
Ridge, a morainic tract of gently rolling highland, composed of 
somewhat sandy till containing .bowlders and striated stones, 
comes to a sudden stop and forms a -cliff fifty to seventy feet 
high at the Iroquois beach. That the Davenport till stretched 
much farther south before the Iroquois water had encroached 
upon it is clear, not alone from the steep cliff, but from the 
immense bowlders scattered over the terrace, evidently left 
behind when the finer materials were washed away by wave 
action. Such bowlders lay on the surface just above the quarry, 
until removed a year ago. The fact that the upper stratified 
clay of the quarry may be traced here and there up the ravine to 
the north, until, about half a mile above the brickyard, it under- 
lies the till of the Davenport ridge, confirms the conclusion. 
The Davenport ridge is a continuation of the mild moraine 
*Inter-glacial fossils from the Don Valley, Am. Geol. Vol. XIII., February 
1894, p. 85-95. 
