Keywords: HiatusConcretionsIsrael060910.jpg en Bored hiatus concretions at the base of the Menuha Formation Upper Cretaceous in the Negev southern Israel own Wilson44691 2010-06-09 Photograph taken by Mark A Wilson Department of Geology The College of Wooster http //www3 wooster edu/geology/MWilson html Negev Concretion Cretaceous geology Bioerosion Geology of Israel |