INTRODUCTION |
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GENERAL GEOLOGIC SETTING OF GUTHRIE COUNTY |
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DEVELOPMENT OF
CRETACEOUS STRATIGRAPHIC NOENCLATURE IN WESTERN IOWA AND THE TYPE DAKOTA AREA |
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THE LOWER DAKOTA
FORMATION, NISHNABOTNA MEMBER, IN WESTERN IOWA |
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FLUVIAL DEPOSITION OF THE NISHNABOTNA MEMBER |
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SEDIMENT SOURCE AREAS |
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MID-CRETACEOUS
PALEOGEOGRAPHY ALONG THE EASTERN MARGIN OF THE WESTERN INTERIOR SEAWAY |
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SUMMARY OF PENNSYLVANIAN
STRATIGRAPHY IN GUTHRIE COUNTY |
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ROAD LOG AND STOP DESCRIPTIONS |
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Stop 1. Natural exposures of Dakota Formation in
Springbrook State Park |
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Stop 2. Hwy. 25 Roadcut Exposure |
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Stop 3. Bar-L Ranch Exposure |
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Stop 4. Heiland Sand and Gravel Pit |
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Stop 5. County Sand and Gravel Pit |
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Stop 6. Middle Pennsylvanian exposure along S.
Racoon River |
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Stop 7. Roadside exposure of a Pennsylvanian
limestone |
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