The X-ray diffraction analyzes of two ferromanganese crust samples found at the base of the Klaus red Jurassic limestone beds of the Unterberg formation indicate pyrolusite as...
This file includes new data on the ratio of silica vs. aluminium (Si/Al) in the bulk rock from the core Bch-1, western part of the Bohemian Cretaceous Basin. The interval covers the Lower Turonian thr
