DESCRIPTION OF PLATES 



Plate I. Section of Wilmette Bay, showing variation in sedimentary strata. The char- 

 acter and thickness of each deposit is indicated, as is also the altitude. The level of the differ- 

 ent water bodies is also indicated. Only a few of the most characteristic of the 63 stations 

 are shown. The measurements of the strata are in inches. Folder at end of volume. 



Plate II. Plan of North Shore Channel, showing location of stations. 



Plate III. Longitudinal section of North Shore Channel, from Foster Avenue to Lin- 

 coln Avenue, showing relation of the ground moraine to the sedimentary strata and indicating 

 location of section stations. 



Plate IV. Cross sections of Toleston beach on the Northwestern University Campus, 

 Evanston. 



Plate V. Station 1. The Unio bed may be plainly seen in the photograph. Photo- 

 graph by Woodruff. 



Plate VI. Station 2. The division between the surface soil and the peaty soil (strata 

 viii-x) is indicated by the rule laid horizontally. The Unio bed is marked by the paper (IJI). 

 Photograph by Woodruff. 



Plate VII. Station 9. The log near the white cardboard is in sand and silt (strata iii-vii). 

 The Unio bed above is in stratum viii. Shells were notably abundant near this old log. 

 Photograph by Woodruff. 



Plate VIII. Station 15. The Unio bed is just beneath the large boulder to the left. 

 The latter may have been brought to this locality in a piece of ice in the spring, and dropped 

 on-the Unio bed. The deposit beneath the 15 inches of gravel and sand, upon which the 

 Unio bed rests, is boulder clay. Photograph by Woodruff. 



Plate IX. Station 16. Stratum viii, showing solid bed of shells forming a marl deposit 

 Photograph by Woodruff. 



Plate X. Station 17. The deposits are lettered from A to M as indicated in the table 

 on page 33. Photograph by Woodruff. 



Plate XI. Station 19. The height of the bank is 10 feet 8 inches. Photograph by 

 Woodruff. 



Plate XII. Station 21. A heavy bed of Unios is shown at C. Large pieces of wood 

 were found at D. Photograph by Woodruff. 



Plate XIII. Station 27. The wood in stratum ii (C) may be plainly seen beneath the 

 gravel, sand, and Unio bed, stratum iii (B). Photograph by Woodruff. 



Plate XIV. Station 28. The relation of the pond deposit (C) with its mollusks, to the 

 lake deposit (B), with its Unio bed, is plainly indicated. Photograph by Woodruff. 



Plate XV. Station 29. The relation of the sedimentary strata, indicated in the table, 

 is here well shown. Photograph by Woodruff. 



Plate XVI. Stations 29-31. General view of the canal looking south from station 32 

 (see plate III, 32). The vertical embankment, to the left in the photograph, extended down 

 the center of the canal its entire length; the majority of the sections were in this embankment, 

 which was later removed by the dredges. Photograph by Woodruff. 



Plate XVII. Station 33. West bank of canal. The hammer indicates position of 

 stratum carrying wood and Anodonta. Spruce cones occur in the stratum below K. Photo- 

 graph by Baker. 



