Sweden: Introduction to the Geology of Sweden |
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... dating it has been shown that several generations are involved ( Gorbatschev ... Rb - Sr age 1 375 Ma according to Skiöld 1976 ; cf. , however , discussion ... Rb - Sr dating of the Åmål I group has yielded a reference line of 1 655 Ma ...
... dating it has been shown that several generations are involved ( Gorbatschev ... Rb - Sr age 1 375 Ma according to Skiöld 1976 ; cf. , however , discussion ... Rb - Sr dating of the Åmål I group has yielded a reference line of 1 655 Ma ...
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... Rb - Sr dating has given 1 690 Ma for Småland granites ( Åberg 1978 ) and 1 655-1 665 Ma for Värmland granites ( Welin et al . 1977 ) . In addition , K - Ar radiometric ages of Småland granites mainly fall between 1 400 and 1 500 Ma ...
... Rb - Sr dating has given 1 690 Ma for Småland granites ( Åberg 1978 ) and 1 655-1 665 Ma for Värmland granites ( Welin et al . 1977 ) . In addition , K - Ar radiometric ages of Småland granites mainly fall between 1 400 and 1 500 Ma ...
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Introduction to the Geology of Sweden. ( Ödman 1957 ) . Rb - Sr dating of massifs in the coastal area has yielded 1 840 Ma ( Welin et al . 1970 ) . Ödman ( 1957 ) distinguished two different migmatite generations : an early ...
Introduction to the Geology of Sweden. ( Ödman 1957 ) . Rb - Sr dating of massifs in the coastal area has yielded 1 840 Ma ( Welin et al . 1970 ) . Ödman ( 1957 ) distinguished two different migmatite generations : an early ...
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Åmål amphibolite Antiform Åre Åreskutan autochthonous basic black shales Caledonian Front Caledonides Cambrian central Sweden composed conglomerates deformation deglaciation deposits dikes dolerites dominated folding foliation formation Frietsch gabbro Gavelin Geijer Geological gneisses Gorbatschev granite greenschist facies greywackes Group intrusions Jämtland County Jämtland Supergroup Kallsjön Kiruna Köli Kulling Late Precambrian leptites locally Lower Allochthon Lundegårdh Lundqvist Magnusson massif metamorphic metasediments metavolcanics Middle Allochthon migmatites minerals Mullfjället mylonites Nappe Nappe Complex Norrbotten County northern Jämtland Norway occur Offerdal Nappe Ordovician Ordovician limestones orogenic Östersund Ottfjället overlain overlying parautochthonous pegmatites phyllites porphyries Precambrian primorogenic quartz quartzites Rb/Sr region Revsund granite Särv Nappe schists sedimentary sediments sequence serorogenic Seve Nappes shales Silurian skarn Skellefte Småland south-western Sweden southern Storsjön stratigraphy Strömberg supracrustal rocks Svecokarelian orogenic SW-Swedish gneisses Sweden syenites Sylarna Synform tectonic units thick Thorslund thrust Törnebohm Upper Allochthon Västerbotten County volcanics Welin western westwards Zachrisson zone