Stratigraphically significant compression floras have been found in lower Conemaugh ironstone beds and lower Conemaugh dark argillaceous shales in the 7-11 Mine, Columbiana County, Ohio. The known fauna associated with the ironstone beds is limited to branchiopods, myriapods, and a single arachnid. The dark argillaceous shales yielded both invertebrate and vertebrate fossils including freshwate...

The ammonoids of the suborder Tornoceratina from Middle to Late Devonian Red Ironstone Formation area around Dillenburg (eastern Rhenish Mountains) are revised, mainly based on historical collections stored in Museum für Naturkunde, Berlin. species Tornoceras typus (Sandberger & Sandberger, 1851), frechi Wedekind, 1918 and Epitornoceras mithracoides (Frech, 1888) re-described original mater...

The type section of the Lower Cenomanian Bahariya Formation at Gebel El-Dist (Bahariya Oasis, Western Desert), Egypt, comprises claystones, mudstones, siltstones and sandstones deposited in fluvial-deltaic coastal plain, lagoonal, estuarine and shallow marine environments. The formation is characterized by an abundance of ferruginous sandstones that locally weather to form prominent iron crusts...

The eastern part of the Adelaide Geosyncline contains well preserved glaciomarine sequences of the Sturtian glaciation (:750–700 Ma) including calcareous or dolomitic siltstone, manganiferous siltstone, dolostone and diamictite units and the associated Braemar ironstone facies. The ironstone facies occurs as matrix to diamictites and as massive to laminated ironstones and comprises abundant Fe ...

Studies in South Australia in the 1930-40's showed that the coastal areas .and, to a lesser extent, the areas inland had inadequate levels of cobalt and copper for livestock health and production. Since these studies, selenium responsive conditions have been recognised in livestock depastured on the ironstone soils in the higher rainfall areas and also in isolated, but at present ill-defined, a...

Middle Ordovician phosphatic ironstone of the Welsh Basin provides new insight into paleoenvironmental significance and ocean chemistry. Deposition occurred in a back-arc basin along southern margin Avalonia as Rheic Ocean opened to south. Ironstone is interpreted have accumulated part an aggradational parasequence on storm-dominated shelf with coastal upwelling. This has laminated pyritic muds...