Cretaceous Exogyra beds over Blansko.
(With a map-sketch and a profile.)
This paper is a revision of the opinions expressed hitherto on the stratigraphic belonging of the Exogyra bed over Blansko. A. Rzehak (3,4,5) in 1883 regarded the higher beds of the quader sandstones in the environs of Blansko as equivalent with the lower part of A. Fric's Bílá-Hora horizon. In Zvejška (10) determined the Exogyra bed as zone IlIa and declared, that it overlies the "oprach", i. e. the fine sand of the zone Ic. This explanation supposed a hiatus.
The writer has executed a map of the part of the countryside in question; he has constructed a profile across the bed with the result: the Exogyra bed is the zone II of Cenomanian and lies in normal Superposition on the quader sandstones of the zone Id, which are here loose, but though well discernible. In the text there follows a detailed description of the profile graphically illustrated. The writer's opinion is supported by a complete list of fossils found hitherto in the Exogyra bed. The vertical of the fossils is adjoined. The consequence is that the Exogyra bed and the accompanying strata are Cenoman and consequently zone II.
Tectonics. On the map-sketch appears in the East the marginal through-fault (δ1), Towards the West there is a translatory fault d2, along which the eastern side has been displaced downwards. Besides this a series of across-going faults (δ3 - δ7) has been stated, along which the Cretaceous is split into several steps. The north-western sides of the strata are thrown downwards by the faults δ3 - d6; the only exception is the fault δ7, along which the south-eastern part slid down.
Quelle: http://hdl.handle.net/2027/mdp.39015077786955?urlappend=%3Bseq=853 (nur mit US-Proxy )