nappe

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nappe

[nap]
(geology)
A sheetlike, allochthonous rock unit that is formed by thrust faulting or recumbent folding or both.
(mathematics)
One of the two parts of a conical surface defined by the vertex.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
L'initiative de mise en place d'un decret de sauvegarde de la nappe de Chtouka, declarant l'etat de penurie de celle-ci, est nee pour juguler les menaces qui pesent sur la poursuite du systeme actuel d'exploitation de la nappe phreatique de la region.
A la fin de cette operation je les couds sur la nappe[beaucoup plus grand que] explique le jeune homme en montrant quelques petits morceaux de nappe accroches sur les murs de son magasin.
The Waziristan ophiolite (WO) is the uppermost thrust sheet, followed eastwards by the Kurram-Khaisora nappe derived from Triassic- Paleocene Outer Shelf, and westwards by the Kahi nappe derived from a Cretaceous oceanic fore-deep sequence (Robinson et al., 2000; Khan et al., 2003).
All these complications implicate, that the trace of the Variscides under the sediments and young nappes is uncertain and can be interpreted from borehole and geophysical documentation only (Dudek, 1980; Batik, 1999; Jiricek, 1991; Adamek, 2005; Schulman et al., 2005; Wessely, 2006).
L'initiative de mise en place d'un d[beaucoup plus grand que]cret de sauvegarde de la nappe de Chtouka, d[beaucoup plus grand que]clarant l'[beaucoup plus grand que]tat de p[beaucoup plus grand que]nurie de celle-ci, est n[beaucoup plus grand que]e pour juguler les menaces qui p[c]sent sur la poursuite du syst[c]me actuel d'exploitation de la nappe phr[beaucoup plus grand que]atique de la r[beaucoup plus grand que]gion.
The southern part of this belt is thrust southward and exposed as metamorphic klippe within the Lesser Himalaya and is known as the Salkhala Nappe in Kashmir having Paleo-Mesozoic sedimentary cover, the Chamba Nappe and Chail Nappe in Himachal, the Garhwal Nappe including the Banali-Satengal-Lansdown klippe in Garhwal, the Almora- Dudatoli Nappe in Garhwal- Kumaon, and also incorporating the Ramgarh Nappe and Askote- Baijnath- Nandprayag Klippe.
The mechanism of gravitational spreading may in specific instances generate gravitational nappes (Merle 1998) but, for the most part, it is effective on continental slopes of the present-day oceans.
Ainsi, la region de Saiss (province El Hajeb), qui regorge d'enormes nappes phreatiques, comporte sur ses terres agricoles des decharges ordures menageres anarchiques, constituant "une usine" de production de toutes sortes d'ordures sans oublier les dommages subis par la nappe phreatique, principal fournisseur des eaux d'irrigation, l'eau potable et le couvercle vegetal et ce, en raison de l'implantation de ces decharges en plein coeur des terrains agricoles tres etendus.
They present outcrop descriptions, maps, and diagrams that explore the along-strike variations in the Hellenide-Anatolide orogen, including the architecture of the Early Tertiary Alpine nappe stack and its Miocene extensional overprint.