...Greg M. Stock; Todd A. Ehlers; Kenneth A. Farley Abstract We present a new method for tracing sediment using detrital apatite (U-Th)/He (AHe) thermochronometry, and use this to quantify the spatial distribution of catchment erosion in the eastern Sierra Nevada, California. Well-developed age...

... the Shire catchment in southern Malawi (Mzuza et al. 2019 ). Between 2011 and 2019, 71 sediment samples were collected from active sand bars (57), levees (2), and freshly deposited muds (12) of the Zambezi River and its major tributaries, from the source in northwesternmost Zambia to the delta...

...Kenneth A. Eriksson; Ian H. Campbell; J. Michael Palin; Charlotte M. Allen Abstract Detrital zircons from six modern rivers draining the Appalachian Mountains were dated using U-Pb isotopes measured by excimer laser ablation induction coupled plasma-mass spectrometry (ELA-ICP-MS). Of the 905 grains...

..., wetlands, and man-made impoundments on the nutrient chemistry of streams and rivers in the eastern United States.
 
 Kenneth A. Sargent is a professor of earth and environmental sciences and director of the River Basins Research Initiative at Furman University. His main research interests focus...

..., and thus olivines in sand samples were likely derived from actively eroding areas of the catchment (e.g., in channel; Ferrier et al., 2013b ). In addition, sand particles at the river mouth might be undersampling waterfall retreat if the knick zone is shedding boulders, and these boulders are slowly...

... is bankfull water discharge, and A b = d b × w b ) ( Williams, 1978 ). The drainage area (catchment area) of a river system is approximated by: (15) \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty...

...Jonathan A. Heim; Paulo M. Vasconcelos; David L. Shuster; Kenneth A. Farley; G. Broadbent Abstract (U-Th)/He dating of late-stage authigenic goethite, combined with corrections for diffusive loss of 4 He by the 4 He/ 3 He methodology, reveals strong correlation between a sample's age and its depth...

.... Logistical support for the conference in Dongying City was provided by Yang Shenbiao. We thank Kevin Biddle, Kenneth Wolgemuth, and Vaughn Robison for their helpful comments and suggestions. © 1998 American Association of Petroleum Geologists. All rights reserved. 1998 American Association...

... may be due to the opening of the Atlantic Ocean and the rejuvenation of east-flowing rivers that eroded headward (westward) across the upper catchment areas, which previously lay within the late Paleozoic west-flowing transcontinental river systems. Consequently, by Jurassic time, the outboard Pan...

... and tidal wetlands, pp. 283~297. KENNETH G. MILLER, DENNIS V. KENT, ANDREWN. BROWER, LAUREL M. BVBELL, MARK D. FEIGlINSON, RICHARD K. OLSSON and RICHARD Z. POORE. Eocene-Oligocene sea-level changes on the New Jersey coastal plain linked to the deep-sea record, pp. 331-339. GORDON E. GRANT, FREDERICK J...

... and Geissman, 2009 ) in the north and continuing into Maastrichtian time (70.6–65.5 Ma; time scale of Walker and Geissman, 2009 ) in the south ( Nilsen, 1993 ). Rare marine acritarchs and abundant pollen from the southern Klamath River Conglomerate member yield a middle Cenomanian age (ca. 95 Ma...

...-group elements to investigate the origin of the Ontong Java Plateau, SW Pacific —James C. Ely and Clive R. Neal 235 Karst in evaporite rocks of the United States— Kenneth S. Johnson 90 McCauley sinks: A compound breccia pipe in evaporite karst, Holbrook basin, Arizona, U.S.A. —James T. Neal...

..., and the preservation and exhumation histories of PBRs on a first-order basis. The preservation potential of PBRs appears to be controlled by their location in a drainage basin. Most of the PBRs in the Granite Dells precarious rock zone are located in the upper reaches of catchments near drainage divides. This may...

... by uplifts and depressions had largely disappeared. Fluvial deltas with incised channels dominated these sequences. Rivers from different catchments built out into the lake to form large deltaic complexes. It is generally accepted that in both marine and nonmarine basins, sequences generated...

... ). Regional hydraulic curves developed by Davidson and North ( 2009 ) from modern river catchment surveys have the form y = a ( x ) b , where y is bankfull depth or discharge, x is drainage basin area, and a and b are region-specific variables dependent on climate...

...Kenneth T. Higgs Abstract Upper Silurian (Pridoli) cryptospores and trilete spores are described from the type section of the Freshwater East Formation in Pembrokeshire, South Wales. This formation is the oldest stratigraphical division of the Lower Old Red Sandstone succession south of the Ritec...

.... Groves 831 Heavy-metal loadings related to urban contamination in the Kooloonbung Creek catchment, Port Macquarie, New South Wales— P.M. Ashley and M.E. Napier 843 Volcanic evolution of a long-lived Ordovician island-arc province in the Parkes region of the Lachlan fold belt, southeastern...

... ratios of Variscan basement rocks toward marine ratios, indicates a change from (1) weathering of crystalline rocks and suevite to (2) ejected Jurassic sediments (Bunte Breccia) in the catchment area as the major source of ion influx to the lake. From that trend, a change in lake water composition...

..., and A. Pekdeger 11 Dispersion of cerussite-rich tailings and plant uptake of heavy metals at historical lead mines near Newtownards, Northern Ireland —N.R. Moles, D. Smyth, C.E. Maher, E.H. Beattie, and M. Kelly 21 The potential for arsenic mobilisation in the Caudal River catchment, north-west...

... Stratigraphy, geochronology, and geochemistry of the Georgie River area, northwest British Columbia, and implications for mineral exploration —Carol A. Evenchick, Vicki J. McNicoll, and Lori D. Snyder 199 A structural reappraisal of the Beardmore–Geraldton Belt at the southern boundary of the Wabigoon...