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Geology
in the Dubuque Area |
1 |
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Stop
1: Little Maquoketa River Mounds
State Preserve – Mississippi River History and Drainage Diversion. |
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by E.
Arthur Bettis III |
3 |
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Ordovician
Galena Group Strata In The Dubuque Area; Stop 2: Tollbridge Inn, Eagle Point Quarry. |
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by Brian
J. Witzke, Richard C. Heathcote, and Raymond R. Anderson |
7 |
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Stop
3: Eagle Point Park – Landscape
Overview. |
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by E. Arthur Bettis III |
13 |
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Upper
Ordovician Brainard Shale (Maquoketa Formation); Stop 4: Highway 20, Dubuque County. |
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by Brian J. Witzke, Raymond R. Anderson, Richard C. Heathcote |
25 |
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Lower
Maquoketa Phosphatic and Organic-Rich Facies, Upper Ordovician, Dubuque
County; Stop 5: Graf. |
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by Brian J. Witzke and Richard C. Heathcote |
39 |