A Concise Geologic Time Scale

James Ogg has over 35 years’ experience in the fields of Marine Stratigraphy, Paleoceanography, Paleomagnetism, Sedimentology. Currently a professor at the Department of Earth and Atmospheric Sciences, Purdue University, Ogg is renowned for coordinating the development of the international geological time scale: over the last 25 years Gradstein et al.'s Time Scales, most recently the 2012 “Geologic Time Scale” (GTS2012), have become a ubiquitous “gold standard” for all Earth Scientists. Ogg has published over 100 articles and coordinated 2 books as first or co- author on aspects of stratigraphy in refereed journals since 1986, and has contributed to over 70 chapters in Deep Sea Drilling Project and Ocean Drilling Program volumes. He has also won numerous awards, including the Geological Society of America: Mary B. Ansari Best Reference Work Award for The Geologic Time Scale 2004 and most recently the 2012 PROSE Honorable Mention Award for a multi-volume scientific reference.

Gabi Ogg applied micropaleontology to Jurassic-Cretaceous correlations before concentrating on public outreach in geosciences. She coordinated the extensive array of graphics in the GTS2012 book, and is the webmaster for the Geologic TimeScale Foundation (http://stratigraphy.science.purdue.edu) and for the TimeScale Creator visualization and database suites (www.tscreator.org). In addition to co-authoring the Concise Geologic TimeScale (GTS2008) book, she has produced numerous posters and time scale cards for public audiences.

Felix M. Gradstein has a distinguished career of more than 35 years in the fields of stratigraphy, micropalaeontology and geochronology. He is renowned for coordinating the development of the international geological time scale: over the last 25 years Gradstein et al.'s Time Scales, most recently the 2012 “Geologic Time Scale” (GTS2012), have become a ubiquitous “gold standard” for all Earth Scientists. Gradstein has authored over 140 scientific publications in the fields of geological time scales, quantitative stratigraphic methods, stratigraphy and sedimentology of petroleum basins, plate tectonics, palaeoceanography, and deep-water micropalaeontology. He has a career that spans the divides between industry, government and academia, with periods working for Esso and Saga Petroleum, the Geological Survey of Canada, and Dalhousie University. He is currently Professor in the Natural History Museum, University of Oslo. Gradstein recently won the 2012 PROSE Honorable Mention Award for a multi-volume scientific reference.