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TABLE 3. Stratigraphy of Northwestern Colorado <br />• <br /> <br />- Iluloccne <br />- Pleislacene <br />- Pliocene <br />- Miocene <br />- Oligocene <br /> <br /> <br /> '- lI~:RTIARY' <br />- Eocene <br />- Paleocene <br />upper • <br />Cretaceous <br /> CRETACEOUS <br />Lower <br />_ <br />Cretaceous <br />- UPper Jurassic <br />- Lower Jurassic <br />- Upper Triassic <br />- Lower Triassic <br />- JURASSIC <br />- TRIASSIC <br />- PERMIAN <br />-PENNSYLVANIAN <br />- MISSISSIPPIAN <br />- DEVONIAN <br />CAMBRIAN <br />CORRELATION OF MAP UNITS <br />Precambrian Y <br />PRECA\IBRIAN <br />Precambrian X <br />(from Tweto 1976) <br />• <br />8 <br />~ _ <br />