http://popups.lib.uliege.be/3041-5527/index.php?id=909 Entrées d’index fr 0 http://popups.lib.uliege.be/3041-5527/index.php?id=5816 Le rapport d’une excursion sur le gisement de la Belle-Roche (Sprimont, Belgique) a permis de réaliser une synthèse des recherches pluridisciplinaires qui s’y sont déroulées depuis 10 ans. Cette grotte fossile conserve des dépôts du Pléistocène moyen ancien, une faune remarquablement riche et variée du Cromérien supérieur (environ 500 000 ans) et une industrie préhistorique à galets aménagés qui est de loin la plus ancienne trace d’occupation humaine du Benelux. The report on the field trip to the La Belle-Roche site (Sprimont, Belgium) during the Symposium « Five Million Years : the Human Adventure » allows us to carry out a synthesis of the multi-disciplinary research which has gone on there for the last 10 years. This fossil cave has yielded deposits from the Early Middle Pleistocene, a remarkably rich and varied fauna of the Upper Cromerian (around 500,000 years old) and a prehistoric industry involving pebble tools which is by far the oldest trace of human occupation in the Benelux Tue, 06 Jan 2026 16:38:31 +0100 Tue, 06 Jan 2026 16:38:38 +0100 http://popups.lib.uliege.be/3041-5527/index.php?id=5816 http://popups.lib.uliege.be/3041-5527/index.php?id=907 The “Fer fort”, a non-oolitic ironstone located in the Eastern Paris Basin on the top of the Dogger cuesta in the border regions of France (Pays-Haut), Belgium (Gaume) and Grand-Duchy of Luxembourg (Gutland), was already used during the Iron Age, together with Jurassic oolitic ironstones. The “Fer fort” ironstone corresponds to the Borne de Fer ferricrete and clastic blocks of ferricrete reworked in karstic cavities of the Dogger plateau and in the entrenched valleys. Ferricretes are the results of a subtractive weathering profile on upflipted regions under climates with tropical affinities, during Early Cretaceous or/and Palaeogene periods. The “Fer fort” ironstone has numerous features specified by thin sections and chemical and mineralogical analyses, but it is almost characterized by the presence of goethite, the great content of Fe (generally more than 50 %), and the lack of phosphorus allowing its use before the Industrial era. Fri, 29 Nov 2024 16:22:03 +0100 Fri, 06 Dec 2024 09:00:03 +0100 http://popups.lib.uliege.be/3041-5527/index.php?id=907