 | | Book | | PROTEROZOIC CHRONOLOGY AND EVOLUTION O F THE MIDCONTINENT REGION; NORTH AMERICA W . R . Van Schmus and M . E . Bickford.... . . . . . . . . . . . . . . . . . . Penokean region . . . . . . . . . . . . . . . . . . . . . . . ...2 7 3 - 1610-1680 Ma old belt, 274 Midcontinent region . . . . . . . . . . . . . . . . . . . . . . . ...rare-earth elements are very similar t o those in modern island arc volcanics (Jahn et al., 1974) or Andean volcanics...basins form by crustal extension behind a volcanic island arc or behind an active arc on a continental margin |  | | Book (edition) | | within the city limits, but also to the surrounding region. In this edition of the Thesaurus, names of cities...newly added are followed by the word “region”; e.g., Stripa region. Names of materials, when used as GeoRef... isochrons isotopes SA SA Abruzzi Autonomous region on the Adriatic Sea. CO N414000N425500 E0144800E0130000...included use on level 3 under igneous rocks(1) basalt family(2). BA basalts volcanic rocks BT igneous...subfiles E and N. See symposia. Ada County Adak Island In central part of Aleutian SW of Alaska Peninsula |  | | Book (edition) | | the city limits, but also to the sur¬ rounding region. Terms for materials in GeoRef, for example, "iron...Aberfeldy Term introduced in 1989. Town and mining region in Tayside, central Scotland; oil field in Lloydminster...included use on level 3 under igneous rocks(l) basalt family(2). IN As of 1981, includes use on level...in GeoRef (see Introduction, p. vi). Autonomous region on the Adriatic Sea. CO N414000N425500 E0144800E0130000...U.S. BA United States NA Columbia Kentucky Adak Island In central part of Aleutian Islands SW of Alaska |  | | Report (issue) | | exposures in a poorly accessible and largely unexplored region. There cannot be many such regions remaining. But... 1986, The role of convection and iron-rich tholeiitic lavas of Munro Township, northeast On- intrusions:...greenstone complex is dominated by spilitic, tholeiitic, andesitic, and basaltic rocks. Rocks belonging...the district, spilitized basalt and basaltic andesites of mildly tholeiitic affinity representing both...greenstone, Harrivaara (29-J); = Basalt West (in Rickard, 1986, table 2); 10 = Basalt East (in Rickard, 1986, |  | | Report (issue) | | magnetic trend; M. C., Massif Central; O, Oleron Island; S, seismic alignement; S.A.S.Z., South Armorican...and the blueschists, now isolated on the little island of Groix, 8 km south of mainland Brittany. The...earliest pre-Hercynian events are located in the region of the Vendee, where a post-Ludlovian/pre-Givetian...marked only between Shamrock Canyon and Oleron Island, probably because the volume of the mafic rocks...susceptibilities suggest that it consists of either gabbro or basalt (Lefort and Segoufin, 1978). Despite the gap that |  | | Report (volume) | | more than 10,000 prospectors to the semi-desert region, and inevitably led to the recognition of diamond... Kassel, Hesse C MCo Fe Greenland G2 Disko Island, Kitaa Prov. C Ult Gra, Fe, Pb, Arm, Sha, Tro...native iron in the crust, for example at Disko Island in central west Greenland, and the Urals in Russia...result from thermal interaction and reduction of basalt with coal or other carbon-rich sediments (Melson...graphitebearing glassy Tertiary basalts on and around Disko Island, Greenland (individual iron masses > 20 tons; Nordenskiöld |
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