Magnetostratigraphy of Upper Paleocene Through Lower Middle Eocene Strata of Northwest Europe
Published:January 01, 1995
Jason R. Ali, Ernie A. Hailwood, 1995. "Magnetostratigraphy of Upper Paleocene Through Lower Middle Eocene Strata of Northwest Europe", Geochronology, Time Scales and Global Stratigraphic Correlation, William A. Berggren, Dennis V. Kent, Marie-Pierre Aubry, Jan Hardenbol
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Ormesby Clay Formation mudstones in eastern Norfolk are the oldest upper Paleocene deposits (Chron C26r) of southern England. The base of the type Thanet Sand Formation (= start of the Thanetian Stage) is approximately 0.65 my younger (C26n). C25n is missing from the stratigraphic record across much of southern England indicating an hiatus >0.5 my between the Ormesby Clay-Thanet Sand Formations and the Lambeth Group. However, in Central London the basal unit of the Lambeth Group, the Upnor Formation, contains a record of C25n. The bulk of the Lambeth Group, the Harwich Formation and lower London Clay Formation, were all deposited during Chron C24r. The NP9/10 boundary, a commonly used Paleocene/Eocene boundary marker, is correlated with the unconformity (approximately 0.4 my) that separates the Lambeth Group from the Harwich Formation. The start of C24n.3n is positioned at the base of Division B of the London Clay and leper Clay Formations. In the Hampshire Basin, an unconformity of at least 0.66 my is marked by the absence of a record of Chron C22n.
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Geochronology, Time Scales and Global Stratigraphic Correlation
Geochronology, Time Scales, and Global Stratigraphic Correlation - The last decade has witnessed significant advances in analytic techniques and methodologic approaches to understanding earth history. This publication is a well-constructed geochronologic framework that allows estimation of rates of geologic processes, correlation of stratigraphies, and placement of discrete events in temporal order. Resulting from a research symposium at the 67th Annual SEPM meeting in New Orleans, Louisiana, April 1993, the 16 papers of this volume represent a broad spectrum of approaches to understanding earth history and the passage of geologic time.