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Ordovician

THE GEOLOGY OF OHIO--THE ORDOVICIAN

Friday, September 10, 1999 The Geology of Ohio--The Ordovician Page: 1 http://www.dnr.state.oh.us/odnr/geo_survey/oh_geol/97_Fall/ordovici.htm Fall 1997 THE GEOLOGY OF OHIO--THE ORDOVICIAN by Michael C. Hansen To geologists, the Ordovician System of Ohio is probably the most famous of the state ...

Chapter K

Chapter K Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin from Medina County, Ohio, through Southwestern and South-Central Pennsylvania to Hampshire County, West Virginia By Robert T. Ryder, Anita G. Harris, and John E. Repetski Stratigraphic framework ...

ORDOVICIAN NEWS

4 ORDOVICIAN NEWS NUMBER 26 (2009) CHAIRMAN'S MESSAGE Dear Colleagues, It was a great personal privilege to assume the role of Chair of the International Subcommission on Ordovician Stratigraphy during the 33 rd International Geological Congress in Oslo.

ORDOVICIAN NEWS 2002

ORDOVICIAN NEWS Nº 23 NOTE FOR CONTRIBUTORS The continued health and survival of Ordovician News depends on YOU to send in items of Ordovician interest such as lists and reviews of recent publications, brief summaries of current research, notices of relevant local, national and international ...

Geology: Ordovician paleogeography and the evolution of the ...

ABSTRACT Paleomagnetic data from northern Appalachian terranes identify several arcs within the Iapetus ocean in the Early to Middle Ordovi cian, including a peri-Laurentian arc at ~10°–20°S, a peri-Avalonian

CONODONTS AND THE CAMBRIAN–ORDOVICIAN BOUNDARY IN WISCONSIN ...

CONODONTS AND THE CAMBRIAN–ORDOVICIAN BOUNDARY IN WISCONSIN Brian P. Parsons 1 and David L. Clark 1 1 Department of Geology and Geophysics, University of Wisconsin –Madison, Madison, Wisconsin 53706 ABSTRACT

LATE ORDOVICIAN MASS EXTINCTIONS: CAUSES AND CONSEQUENCES - A ...

LATE ORDOVICIAN MASS EXTINCTIONS: CAUSES AND CONSEQUENCES - A VIEW FROM LAURENTIA. William B.N. Berry, Department of Earth and Planetary Science, 301 McCone Hall, University of California, Berkeley, California 94720 USA. bberry@uclink4.berkeley.edu Introduction: Sepkoski [1] closely studied ...

Geochemical analyses of oils produced from the Ordovician ...

Provenance of Oil on the Findlay Arch Based on Geochemistry and Basin Modeling (Illinois, Appalachian, and Michigan Basins), Elisabeth L. Rowan, Joseph R. Hatch, Robert T. Ryder, and John E. Repetski, U.S. Geological Survey, Reston, VA 20192, erowan@usgs.gov, jrhatch@usgs.gov, rryder@usgs.gov ...

The base of the Middle Ordovician in China with special ...

The base of the Middle Ordovician in China with special reference to the succession at Hengtang near Jiangshan, Zhejiang Province, southern China

ORDOVICIAN

4 ORDOVICIAN NEWS Number 28 (2011) CHAIRMAN'S MESSAGE 'Now comes a curious sequel to our story. A proposal has been made to take all Sedgwick's Arenig and Bala beds, and Murchison's Llandeilo and Caradoc, and constitute not Upper Cambrian, not Lower Silurian, but Ordovician with a view to ...