. "Po rozt\u00E1n\u00ED ledov\u00E9ho \u0161t\u00EDtu pokr\u00FDvaj\u00EDc\u00EDho Gondwanu a souvisej\u00EDc\u00EDm vzestupu hladiny mo\u0159\u00ED v nejvy\u0161\u0161\u00EDm ordoviku a baz\u00E1ln\u00EDm siluru se v paleodepres\u00EDch \u0161elf\u016F Severn\u00ED Afriky a Ar\u00E1bie ukl\u00E1daly bitumin\u00F3zn\u00ED \u010Dern\u00E9 b\u0159idlice. Tyto b\u0159idlice chyb\u00ED na paleoelevac\u00EDch kter\u00E9 byly zaplaveny a\u017E pozd\u011Bji, kdy\u017E anoxick\u00FD event ji\u017E skon\u010Dil. Roz\u0161\u00ED\u0159en\u00ED silursk\u00FDch \u010Dern\u00FDch b\u0159idlic je nyn\u00ED dob\u0159e zn\u00E1mo z vrt\u016F v centr\u00E1ln\u00EDch \u010D\u00E1stech murzuck\u00E9 p\u00E1nve v jz. Libyi. V t\u00E9to oblasti jsou silursk\u00E9 \u010Dern\u00E9 b\u0159idlice hlavn\u00EDmi ropomate\u010Dn\u00FDmi sedimenty. V karot\u00E1\u017En\u00EDch profilech jsou silursk\u00E9 \u010Dern\u00E9 b\u0159idlice snadno identifikovateln\u00E9, proto\u017Ee maj\u00ED zv\u00FD\u0161en\u00E9 koncentrace uranu a tut\u00ED\u017E vyjazuj\u00ED vysok\u00E9 hodnoty gama-aktivity. Uran se zde vysr\u00E1\u017Eel za reduk\u010Dn\u00EDch podm\u00EDnek, p\u0159i\u010Dem\u017E obecn\u011B lze pozorovat p\u0159\u00EDmou \u00FAm\u011Brnost mezi obsahem uranu a obsahem organick\u00E9 hmoty v b\u0159idlic\u00EDch. Roz\u0161\u00ED\u0159en\u00ED organickou hmotou bohat\u00FDch \u010Dern\u00FDch silursk\u00FDch b\u0159idlic v p\u00E1smech v\u00FDchoz\u016F na okraj\u00EDch murzuck\u00E9 p\u00E1nve bylo dlouho m\u00E1lo zn\u00E1mo."@cs . "P(GA205/99/1322), Z(AV0Z30130516)" . "RIV/67985831:_____/06:00051274" . "BH - Kr\u00E1lovstv\u00ED Bahrajn" . "[43E2D41D9544]" . "101;118" . . "4"^^ . "GeoArabia" . . . "Following the melting of the Gondwanan icecap and the resulting postglacial sea-level rise, organic rich shales were deposited in shelfal palaeo-depressions across North Africa and Arabia during the latest Ordovician to earliest Silurian. The unit is absent on palaeohighs that were flooded only later when the anoxic event had already ended. The regional distribution of the Silurian black shale is now well-known for the subsurface of the central parts of the Murzuq Basin, in Libya, where many exploration wells have been drilled and where the shale represents the main hydrocarbon source rock. On well logs, the Silurian black shale is easily recognisable due to increased uranium concentrations and, therefore, elevated gamma-ray values. The uranium in the shales %22precipitated%22 onder oxygen-reduced conditions and generally a linear relationship between uranium and organic content is developed."@en . "1"^^ . "478716" . "18"^^ . . . "Following the melting of the Gondwanan icecap and the resulting postglacial sea-level rise, organic rich shales were deposited in shelfal palaeo-depressions across North Africa and Arabia during the latest Ordovician to earliest Silurian. The unit is absent on palaeohighs that were flooded only later when the anoxic event had already ended. The regional distribution of the Silurian black shale is now well-known for the subsurface of the central parts of the Murzuq Basin, in Libya, where many exploration wells have been drilled and where the shale represents the main hydrocarbon source rock. On well logs, the Silurian black shale is easily recognisable due to increased uranium concentrations and, therefore, elevated gamma-ray values. The uranium in the shales %22precipitated%22 onder oxygen-reduced conditions and generally a linear relationship between uranium and organic content is developed." . "RIV/67985831:_____/06:00051274!RIV07-GA0-67985831" . "postglacial anoxy; early Llandovery; Murzuq Basin; palaeo-depressions; gamma-spectrometry"@en . "Redfern, J." . . . . . . "Identification of early Llandovery (Silurian) anoxic palaeo-depressions at the western margin of the Murzuq Basin (southwest Libya), based on gamma-ray spectrometry in surface exposures"@en . "Identification of early Llandovery (Silurian) anoxic palaeo-depressions at the western margin of the Murzuq Basin (southwest Libya), based on gamma-ray spectrometry in surface exposures"@en . "Identifikace anoxick\u00FDch paleodepres\u00ED ve spodn\u00EDm llandovery z\u00E1padn\u00EDho okraje murzuck\u00E9 p\u00E1nve (jihoz\u00E1padn\u00ED Libye), zalo\u017Een\u00E1 na gammaspektrometrii povrchov\u00FDch odkryv\u016F"@cs . "11" . . "Identification of early Llandovery (Silurian) anoxic palaeo-depressions at the western margin of the Murzuq Basin (southwest Libya), based on gamma-ray spectrometry in surface exposures" . "3" . "1025-6059" . . . . "Identification of early Llandovery (Silurian) anoxic palaeo-depressions at the western margin of the Murzuq Basin (southwest Libya), based on gamma-ray spectrometry in surface exposures" . . "L\u00FCning, S." . . . "Identifikace anoxick\u00FDch paleodepres\u00ED ve spodn\u00EDm llandovery z\u00E1padn\u00EDho okraje murzuck\u00E9 p\u00E1nve (jihoz\u00E1padn\u00ED Libye), zalo\u017Een\u00E1 na gammaspektrometrii povrchov\u00FDch odkryv\u016F"@cs . "Fello, N." . . "\u0160torch, Petr" .