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Galena Group
Download Printable Version of the Geology and Why It Matters Story
Preliminary Geological Feasibility Report
UPPER IOWA RIVER WATERSHED: PHASE 4: Ridgeway 7.5' Quadrangle
Paleozoic Lithostratigraphic Nomenclature for Minnesota
A Preliminary Stratigraphic Study of the Galena Group of Winneshiek County, Iowa
Facets of the Ordovician Geology of the Upper Mississippi Valley Region
Springshed Assessment Methods for Paleozoic Bedrock Springs of Southeastern Minnesota
Guide to the Geology, Hydrogeology, History, Archaeology, and Biotic Ecology of the Driftless Area of Northwestern Illinois, Jo Daviess County
Minnesota at a Glance: Fossils of Southern Minnesota
Lithostratigraphy of Precambrian and Paleozoic Rocks Along Structural Cross Section KY-1, Crittenden County to Lincoln County, Kentucky
Ordovician) in Northern Illinois
Plate 2, Bedrock Geology Map (6.375Mb Application/Pdf)
Sedimentology of the Middle Ordovician Platteville Formation Southeastern Minnesota
AS 07-6,100908 5-17 Replacement Fig 2-1 Stratchart
Fossil Collecting in the Twin Cities Area I C a L
Geology of the Root River State Trail Area, Southeastern Minnesota by John H
The Platteville and Galena Groups in Northern Illinois
Circ 567 Morse.Indd
Top View
This Map Provides an Overview of the Distribution of Karst
Winneshiek County, Iowa
Stratigraphy of Middle Ordovician Rocks in the Zinc-Lead District of Wisconsin, Illinois, and Iowa
The Ordovician