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Richard J. Howarth
Researcher at University College London
Publications - 88
Citations - 5836
Richard J. Howarth is an academic researcher from University College London. The author has contributed to research in topics: Geologist & Control chart. The author has an hindex of 28, co-authored 88 publications receiving 5402 citations. Previous affiliations of Richard J. Howarth include University of Bristol & University of Cambridge.
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Journal ArticleDOI
Strontium Isotope Stratigraphy: LOWESS Version 3: Best Fit to the Marine Sr‐Isotope Curve for 0–509 Ma and Accompanying Look‐up Table for Deriving Numerical Age
TL;DR: An improved and updated version of the statistical LOWESS fit to the marine 87Sr/86Sr record and a revised look-up table (V3:10/99; available from jmcarthur@ucl.ac.uk) is presented in this article.
Journal ArticleDOI
Natural organic matter in sedimentary basins and its relation to arsenic in anoxic ground water: the example of West Bengal and its worldwide implications
John M. McArthur,D.M. Banerjee,Karen A. Hudson-Edwards,Rosaline Mishra,R. Purohit,P Ravenscroft,A Cronin,Richard J. Howarth,A Chatterjee,T Talukder,David Lowry,S Houghton,DK Chadha +12 more
TL;DR: In this paper, the authors investigated the mechanism of As release to anoxic ground water in alluvial aquifers, and sampled ground waters from 3 piezometer nests, 79 shallow ( 80 m) wells, in an area 750 m by 450 m, just north of Barasat, near Kolkata (Calcutta), in southern West Bengal.
Journal ArticleDOI
Statistics For Strontium Isotope Stratigraphy: A Robust Lowess Fit to the Marine Sr‐Isotope Curve For 0 to 206 Ma, With Look‐Up Table For Derivation of Numeric Age
TL;DR: In this paper, a best fit curve to 1849 strontium isotope data for the period 0 to 206 Ma using the LOcally-WEighted regression Scatterplot Smoother (LOWESS) method was provided.
Book Chapter
Strontium isotope stratigraphy
TL;DR: Gradstein et al. as discussed by the authors used the curve of 87Sr/86Sr through time and the data used to derive it to date and correlate sediments using Strontium isotope stratigraphy.
Journal ArticleDOI
Basinal restriction, black shales, Re‐Os dating, and the Early Toarcian (Jurassic) oceanic anoxic event
TL;DR: In this paper, a crossplot of Mo/total organic carbon (TOC) profiles through the Lower Toarcian black shales of the Cleveland Basin, Yorkshire, United Kingdom, and the Posidonia shale of Germany and Switzerland reveal water mass restriction during the interval from late tenuicostatum Zone times to early bifrons Zone times, times which include that of the putative Early Toarcians oceanic anoxic event.