Ordovician
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- Facets of the Ordovician Geology of the Upper Mississippi Valley Region
- Marine Redox Variability from Baltica During Extinction Events in the Latest Ordovician–Early Silurian T ⁎ Seth A
- A Volcanic Trigger for the Late Ordovician Mass Extinction? Mercury Data from South China and Laurentia
- Review of the Lower Ordovician Ellenburger Group of the Permian Basin, West Texas
- Ordovician: the Cincinnatian and the Richmondian Invasion
- Notes on Middle Ordovician, Mississippi and Alabama
- Lower Silurian Stromatolites in Shallow-Marine Environments of the South
- Exceptionally Well-Preserved Fossils in a Middle Ordovician Impact Crater
- Ordovician News
- The Paleozoic and Mesozoic Rocks; a Discussion to Accompany the Geologic Map of the United States
- Ordovician–Silurian Extinction Events
- The Middle-Upper Ordovician Simpson Group of the Permian Basin: Deposition, Diagenesis, and Reservoir Development
- Michilogic Time Line
- New Occurrences of Ordovician, Devonian, and Carboniferous Conulariids from North America, South America, and Asia
- Understanding the Great Ordovician Biodiversification Event (GOBE): Influences of Paleogeography, Paleoclimate, Or Paleoecology?
- Distinguishing Cambrian from Upper Ordovician Source Rocks: Evidence from Sulfur Isotopes and Biomarkers in the Tarim Basin
- W020100430623012761335.Pdf
- Late Ordovician Glaciation Initiated by Early Land Plant Evolution Andpunctuatedbygreenhousemassextinctions
- Understanding Mechanisms for the End-Permian Mass Extinction and the Protracted Early Triassic Aftermath and Recovery
- Geologic Time Scale for Kansas
- Redalyc.Global Series and Stages for the Ordovician System: a Progress
- Origination, Extinction, and Mass Depletions of Marine Diversity
- Mass Extinction
- Multiple Sulfur Isotope Geochemistry During the Permian-Triassic Transition
- Ordovician Plankton Revolution’ in the Late Cambrian
- Ordovician of the World
- What Is the Name for the Geologic Time Division That Is Not Labeled?
- Revising the Geological Time Scale: a CONOP9 Graptolite Composite from the Middle Ordovician Rocks of Newfoundland
- Phanerozoic Time Frame (Paleozoic Era) B) Why a Cambrian “Explosion” C) Introducing Our Ancestors
- Mark E. Patzkowsky Professor of Geosciences 539 Deike Building the Pennsylvania State University University Park, PA 16802-2714
- Cascading Trend of Early Paleozoic Marine Radiations Paused by Late Ordovician Extinctions
- Ordovician–Silurian Lilliput Crinoids During the End-Ordovician Biotic Crisis