Breda Formation whale bones were found), the Zenderen Member (green, glauconiferous fine sand) and the Delden Member (sandy, glauconite and goethite bearing clay and loam. The Breda Formation corresponds largely with the Berchem Formation of northern Belgium. Breda Formation The Breda Formation (; abbreviation: BR) is a geologic formation in the subsurface of the Netherlands. The formation consists of marine glauconiferous sands and clays that were deposited during the Miocene epoch. Although the formation is not very rich in fossils, sometimes bones of fishes, mammals ("Leptophoca cf. proxima", "Protophocaena minima"), shells and shark teeth (a.o of Megalodon) are found. The Breda Formation
Siege of Breda (1624) with modern defences. Thus, in 1531 he inspired the construction of the late medieval style walls of Breda. These were later replaced by modern fortifications. In 1587 and 1622, the defences were further expanded and updated. The Breda fortress consisted of a very high earthen thoroughfare with 15 bastions and a moat. The 55 to 117 meter wide canal was five feet deep and was provided with water from Mark. Access to the city was made possible by four brick gates. Crescent ravelins were applied in the ditches. Hornwork was placed on the gates and at the . Stakewall were