
Effigy Mounds National Monument and the prehistoric earthworks at Fish Farm Indian Mounds State Recreation Area anchor the eastern edge of this landscape along the Mississippi River. The mid-1980s terrain is defined by the deeply carved valleys of the Upper Iowa River and the Yellow River, where numerous quarries dot the bluffs overlooking settlements like Decorah and Waukon. The region's archaeological and geological significance is further highlighted by features such as Wonder Cave and Glenwood Cave.
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2 editions found
1900 · Lancaster
USGS Topo · 1:125,000
1901 · Oelwein
USGS Topo · 1:125,000
1902 · Elkader
USGS Topo · 1:125,000
1903 · Waukon
USGS Topo · 1:125,000
1904 · Lancaster
USGS Topo · 1:125,000
1906 · Decorah
USGS Topo · 1:125,000
1908 · Lancaster
USGS Topo · 1:125,000
1923 · Viroqua
USGS Topo · 1:62,500
1924 · Gays Mills
USGS Topo · 1:62,500
1926 · Gays Mills
USGS Topo · 1:62,500