154 
The American Geoltxjitit. 
Sc'iitombcr, 1896 
Westward in tlie region of* the interlobate axis this moraine 
probably connects witli the Queen's River moraine described 
by Woodworth and Marbut in The Journal of Geology. 
TlIK WICKFORD SUB-STAGES, 
Interior to and northward of the Slocuraville stage of re- 
treat there are several subparallel ridges and terraces of 
stratified drift and mounds of till with occasional frontal 
overwash plains. These accumulations seldom exceed twenty 
or thirty feet in altitude. The till ridges and knobs are well 
developed in the vicinity of the railroad station at Wickford 
Junction. On the west of the railroad there is exhibited the 
characteristic relation of submarginal till mounds to the 
sand-plain formed outside of the ice as indicated in the ap- 
pended section (figure 1). The fosse between the head of the 
sand-plain and the till mounds is a marked feature on the 
island of Nantucket. Other instances are to be found in 
Clag/er. 
Fig. 1. Section of frontal i^aiid-plain- with ico-contact slope, showing intraglacial 
position of till Icnobs of tlie moraine. 
southern New England where the same relation exists and 
\vhere the contact slope at the northern head of the sand-plain 
serves as a datum line for discriminating intraglacial from 
extraglacial deposits. 
Wickford cove is surrounded on the south and west by un- 
important but recognizable morainal masses. Near Belleville 
there is a small outwash plain surmounting the moraine. The 
surface of the plain is about 100 feet below that of the Slo- 
cumville plain. So marked a difference of level between stages 
of retreat with a minimum of difference of time can hardly 
be explained on the hypothesis of control by sea level during 
submergence. The level in the two cases is obviously deter- 
mined largely by local topographic conditions. 
THE DAVISVILLE STAGE. 
In the vicinity of Davisville, west of the railroad, there oc- 
curs a high isolated mass of gravel, with steep northern slopes 
and a gentle southward incline in the form of a fan. The 
contour of this knob and its elevation are approximately in- 
