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Download as PDF; Printable version; In other projects ... Select a region on the graphical atlas to view a list of the fossiliferous stratigraphic units in that area ...
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Cretaceous stratigraphy of the central Colombian Eastern Ranges; Age Paleomap VMM Guaduas-Vélez W Emerald Belt Villeta anticlinal Chiquinquirá-Arcabuco Tunja-Duitama Altiplano Cundiboyacense El Cocuy; Maastrichtian: Umir: Córdoba: Seca: eroded: Guaduas: Colón-Mito Juan: Umir: Guadalupe: Campanian: Córdoba: Oliní: Santonian: La Luna ...
This is a list of Global Boundary Stratotype Sections and Points.Since 1977, Global Boundary Stratotype Sections and Points (abbreviated GSSPs) are internationally agreed upon reference points on stratigraphic sections of rock which define the lower boundaries of stages on the geologic time scale.
Paleozoic Stratigraphy of the Upper Midwest, USA; Dates approximate: Maquoketa Group (446–440 Ma) Galena Group (454–446 Ma) Dubuque Formation (447–446 Ma) Wise Lake Formation (449.4–447 Ma) Decorah Shale (454–452 Ma) Platteville Limestone (455–454 Ma) Glenwood Shale (~455 Ma) St. Peter Sandstone (~459–~455 Ma) Knox Unconformity ...
The principles of lithostratigraphy were first established by the Danish naturalist, Nicolas Steno, in his 1669 Dissertationis prodromus. [1] A lithostratigraphic unit conforms to the law of superposition, which in its modern form states that in any succession of strata, not disturbed or overturned since deposition, younger rocks lies above older rocks. [2]