Le « Calcaire d’Etroeungt», extrême sommet du Famennien, reconnu historiquement par Gosselet, fait l’objet d’une représentation détaillée, avec positionnement des niveaux qui ont fourni des faunes, dans les coupes de la carrière du Parcq à Etroeungt, stratotype historique, et dans celle de la tranchée d’Avesnelles, proposée antérieurement comme parastratotype, car la série est incomplète dans la carrière du Parcq. Toutefois la recherche d’un nouveau parastratotype est indispensable car la limite supérieure est masquée dans la coupe de la tranchée d’Avesnelles qui par ailleurs s’avère être très pauvre en faune. The Uppermost Famennian “Etroeungt Limestone”, historically recognized by Gosselet, is the subject of a detailed presentation. Levels providing faunas are situated in the historic stratotype du Parcq quarry section at Etroeungt, and in the Avesnelles railway section, that has earlier been proposed as a parastratotype, because the sequence is incomplete in the du Parcq quarry. However, investigation for a new parastratotype is necessary because the upper limit is hidden in the Avesnelles railway section which also proves to be very poor in fauna.
Located in
Library
/
RBINS Staff Publications
The coticule is an Ordovician aged metamorphic rock only present in the southern part of the Stavelot Massif on the towns of Vielsam and Lierneux. It comes in centimeter thick layers consisting in micrometric crystals of spessartite, microphyllites of micas, infra micrometer quartz. Its exceptional sharpening properties of the metal (razor sharp thin, sharp broad, sharp curve) gave its reputation of a natural abrasive stone and a global distribution (barber, circumciser, surgeon, butcher, carpenter, cabinetmaker, arborist, gardener, winemaker, tanner, coachbuilder ...). Exploited and shaped since the 16th century, the coticule was exported as a whetstone (aka razor stone), the "bouts belges" and to special forms. It was operated by craftsmen, primarily from the surface in open pits, in trenches and then by underground galleries, following the evolution of mining techniques of lighting and drainage. The material was sawn, made in standard sizes and polished by the quarry workers and then in small workshops. The high number of models, the various manufacturing steps entirely manual, the low yield (2-5%), competition from synthetic stones, and the disappearance of part of the customer after the Second World War sounded the death knell of this unique activity. Located in Lierneux, a quarry still operates today the coticule and most of its production is exported to the United States of America. The old mining galleries are today the winter refuge of bats populations. They are considered as cavities of scientific interest. Finally, the Museum of the coticule in Salmchâteau (Vielsalm) presents this manufacturing industry with a global destiny.
Located in
Library
/
RBINS Staff Publications
