(Article of periodic en Anglais - 2011)

Document title

Secondary minerals from extrapedogenic per latus acidic weathering environments at geomorphic edges, Eastern Nebraska, USA

Authors(s) and Affiliation(s)

JOECKEL R.M. (1 2) ; WALLY K.D. (3) ; ANG CLEMENT B.J. (4) ; HANSON P.R. (1) ; DILLON J.S. (5) ; WILSON S.K. (6) ;
(1) Fac. of Geology and Soils, Fac. of Geography, Conservation and Survey Div., School of Natural Resources, Univ. of Nebraska-Lincoln, Lincoln, ETATS-UNIS
(2) Dep. of Earth and Atmospheric Sciences, Univ. of Nebraska-Lincoln, Lincoln, ETATS-UNIS
(3) Waste Management Division, Dep. of Environmental Quality, State of Nebraska, Lincoln, ETATS-UNIS
(4) Dep. of Biology, Doane College, Nebraska, Crete, ETATS-UNIS
(5) Dep. of Geoography and Earth Science, Univ. of Nebraska-Kearney, Kearney, ETATS-UNIS
(6) Northern Great Plains Inventory and Monitoring, Rapid City, ETATS-UNIS


Acidic weathering of the sulfidic Upper Cretaceous Carlile and Pierre Shales in Nebraska has led to the precipitation of the Al sulfate–hydroxide minerals aluminite, alunite, “basaluminite”/felsöbányaite (e.g.,), the aluminum hydroxides gibbsite and bayerite, and the rare Al phosphate hydroxide vashegyite. Kaolinite has also been produced as a result of this acidic weathering. These minerals do not appear as neoformed constituents in any extant soils in the region. This acidic weathering and the formation of new minerals is extrapedogenic because it occurs well below the limit of modern soil sola. These processes also occur at the edges of major landscape elements and can be considered to have a strong lateral component processes, making them “per latus” processes


Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2011, vol. 85, no3 [pp. 253-266]

Bibliographic references : 1 p.

Collation : 12 fig.



INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2011.01.011

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2011
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