EM 1110-2-1100 (Part I)
30 Apr 02
GREAT LAKES, USA-CANADA
Over 600 U.S. Federal navigation projects. Deep-draft ocean
N
Bedrock bluffs, sand- commerce possible April-November via St. Lawrence Seaway.
Quebec
deficient shores, ice-
bound in winter.
Ontario
Superior
Duluth-Superior:
major sand spit
Huron
Wisconsin
Ontario
Glacial till and sand
Michigan
bluffs, high erosion
New York
rate, limited gravel
L. St. Clair
and sand beaches
e
Eri
Iowa
Pennsylvania
Illinois
Indiana
Ohio
Extensive urban and industrial infrastructure:
Glacial till and shale
Lakes Erie, southern Michigan, southern Huron.
bluffs, variable erosion
200
0
200
400 Kilometers
rate, limited gravel and
sand beaches, fringing marshes
Figure I-2-20. Great Lakes shoreline characteristics
Coastal Diversity
I-2-21
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