Des traces de lithalses sur des replats de la retombée nord de la crête de la Vecquée ; Lithalses traces on slopes of the northern fall of the "Vecquée" ridge
Pissart (2009, 2014) produced a map showing the distribution of "fish tanks", traces of lithalses, in Eastern Belgium (Hautes Fagnes) and he insisted on a close relationships with the systematic presence in the subsoil of the Upper Cambrian rocks (former Revinian), namely: quartzites, quartzophyllades and phyllades. He made of this lithological aspect a fundamental factor, as well as the periglacial climatic conditions, to justify the formation of lithalses in Eastern Belgium. He points out one exception in the Elsenborn military camp, where the Lower Devonian sandstones and silty shales are e... Mehr ...
Verfasser: | |
---|---|
Dokumenttyp: | newspaper article |
Erscheinungsdatum: | 2017 |
Verlag/Hrsg.: |
Les Amis de la Fagne
|
Schlagwörter: | periglacial morphologies / Lidar prospection / lithalses / Eastern Belgium / Cambrian / Quaternary / Physical / chemical / mathematical & earth Sciences / Earth sciences & physical geography / Physique / chimie / mathématiques & sciences de la terre / Sciences de la terre & géographie physique |
Sprache: | Französisch |
Permalink: | https://search.fid-benelux.de/Record/base-28534434 |
Datenquelle: | BASE; Originalkatalog |
Powered By: | BASE |
Link(s) : | https://orbi.uliege.be/handle/2268/213202 |
Pissart (2009, 2014) produced a map showing the distribution of "fish tanks", traces of lithalses, in Eastern Belgium (Hautes Fagnes) and he insisted on a close relationships with the systematic presence in the subsoil of the Upper Cambrian rocks (former Revinian), namely: quartzites, quartzophyllades and phyllades. He made of this lithological aspect a fundamental factor, as well as the periglacial climatic conditions, to justify the formation of lithalses in Eastern Belgium. He points out one exception in the Elsenborn military camp, where the Lower Devonian sandstones and silty shales are exposed. The researchs that led to the realization of this map were carried out on the aerial photos made available to researchers and the public, from the 1950s, by the Military Geographical Institute (IGM). In 2015, the Walloon Public Service, through its "WalOnMap" site, has launched digital terrain models generated by LIDAR (Laser Detection and Ranging) images, including the "2013-2014 (Hillshade)" model, which only gives the relief of the ground, irrespective of the vegetation cover, and offers, by this advantage, a potential for prospecting. This one is clearly superior to that of the above-mentioned aerial photos. ; Pissart (2009, 2014) a produit une carte de répartition des "viviers", traces de lithalses, en haute Belgique, et il insiste sur une relation étroite avec la présence systématique, dans le sous-sol, des roches du Cambrien sup. (anc. Revinien), à savoir des quartzites, quartzophyllades et phyllades. Il fait de cet aspect lithologique un facteur fondamental, au même titre que les conditions climatiques périglaciaires, pour justifier la formation des lithalses en haute Belgique. Il signale une seule exception dans le camp militaire d’Elsenborn, où affleurent des grès et schistes du Dévonien inférieur. Les recherches qui l’ont conduit à la réalisation de cette carte ont été effectuées sur les photos aériennes mises à disposition des chercheurs et du public, dès les années 1950, par l’Institut Géographique ...