LIMIT OF AREA IN WHICH THICKNESS OF PEORIA LOESS HAS BEEN MEASURED
LOESS ISOPACH--20 m
LOESS ISOPACH--3 m
LOESS ISOPACH--12 m
LOESS ISOPACH--6 m
LOESS ISOPACH--18 m
LOESS ISOPACH--9 m
LOESS ISOPACH--15 m
LOESS ISOPACH--21 m
LOESS ISOPACH--30 m
WESTERN EXTENT OF BROADWATER FORMATION IN SUBSURFACE
Map boundary
OUTER LIMIT OF GLACIAL ADVANCE OR STILLSTAND--Concealed
OUTER LIMIT OF GLACIAL ADVANCE OR STILLSTAND--Inferred
OUTER LIMIT OF GLACIAL ADVANCE OR STILLSTAND
LOESS ISOPACH--2 m
LOESS ISOPACH--4 m
LOESS ISOPACH--10 m
OUTWASH CHANNEL--Right bank
OUTWASH CHANNEL--Left bank