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Distribution of Grenville rocks were compiled from: Bauer and others, 2003; Dawson and others, 2003; Fitzsimons, 2000a; Gower and others, 1991; Hanson, 2003; Higgins and Leslie, 2000; Jacobs and others, 1998; Jacobs and Thomas, 1994; Kelling and others, 1985; Ramos and Aleman, 2000; Restrepo-Pace and others, 1997; Rickers and others, 2001; Trettin, 1991; Van Schmus and others, 1993; Yoshida and Vitanage, 1993). LOCALITY NAMES AD, Adelaide geosyncline; AL, Alexander terrane; ALB, Albany-Fraser belts; AM, Amadeous basin; ANS, Arabian-Nubian Shield; AR, Arabian Peninsula; AU, Austroalpine of the eastern Alps; BA, Baltic Basin; BAV, Baikal-Vitim; CAM, Caman-Moquui Fault; CAN, Canadian Arctic; CAP, Cape of Good Hope; CAR, Carpathians; CAS, Caspian Sea; CC. Canadian Cordillera; CE, Central Asia mobile belt; CEI, Central India tectonic zone; COR, Cordillera de Merida; CU, Curnamona craton ; DA, Damara belt; EAG, Eastern Gnats Belt; EAO, East Asia Orogenic Belt; EAS, East Africa Orogenic Belt; GA, Gariep belt; GE, Georgina basin; HEL, Helvetic and Penninic basement in western Alps; HER, Herat Fault; HI, High Himalaya; IG, Igarka Uplift; KAL, Kalahari; KAN, Kangdian; KAO, Kaok belt; KH, Kharaulakh Mountains; KI, Kingan-Burega; KM, Klamath Mountains; KO, Kolyma; KOP, Kopet Dagh Fault; LA, Lambert Glacier-Prydz Bay; LH, Lesser Himalaya; LI, Lifilian; LU, Lazlow-Holm Bay; LUB, Lublin slope; MO, Mozambique belt; NA, Nanhua; NG, Ngalla basin; NI, Nixon Fork terrane; NAP, Northern Apppalachia; OSOI Officer-Savory basin; OL, Olenek uplift; OS, Ossa-Morena; OT, Otavi Platform; OTT, Ottawa graben; PAT, Paton highland; PE, Pechora; PRA, Pranhita-Godavari; QI, Qinling belt; QU, Qubangguuide fold belt; RA, Rajasthan; RU, Ruby terrane; SR, Salt Range; SAP, Saptura Mobile belts; SAX, Saxo-Thuringia; SEB, Serbomacedonian massif; SEW, Seward terrane; SNT, Son-Narmada-Tapti; SON, Son-Mahanadi; SOU, Southalpine in eastern Alps; TAM, Taminian belt; TAS, Tasman line; TAY, Taymyr; TE, Tepl·-Barrand; TO, Tocantins; TRE, Trans-European Suture Zone; TRM, Transantarctic Mountains; TU, Turakhansk uplift; UM, Ural Mountains; VA, Varanger Peninsula; WA, Wasatch line; WC, West Congo belt; Y, Yucatan; YE, Yenisey Ridge; YO,Yodoma-Maya; ZA, Zambezi NEOPROTEROZOIC AULACOGEN OR INTRACONTINENTAL RIFT. Boxes on downtrown side. OPEN-FILE REPORT 2009-1119 PLATE 2 of 3 Pamphlet accompanies map 0 5S 5N 10S 15S 20S 25S 10N 15N 30S 20N 25N 35S 30N 40S 35N 45S 40N 45N 50S 50N 55S 55N 60S 60N 65S 5E 65N 70S 70N 75S 75N 80S 80N 5W 85S 85N 95E 90E 70E 85E 45E 25E 60E 80E 30E 10E 15E 75E 55E 20E 35E 65E 50E 40E 90W 70W 75W 60W 95W 65W 55W 40W 20W 30W 50W 10W 45W 80W 15W 25W 35W 85W 130E 120E 140E 11 5E 125E 135E 145E 11 0E 105E 180E 150E 160E 175E 170E 100E 155E 165E 150W 130W 105W 135W 160W 155W 0W 125W 165W 120W 145W 140W 175W 11 0W 180W 11 5W WORLD MAP SHOWING MAJOR NEOPROTEROZOIC CONTINENTS AND CONTINENTAL MARGINS, ASSOCIATED STRUCTURES, AND GRENVILLE- AGE (1,200 TO 900 MA) ROCKS CONSIDERED TO BE ALONG MESOPROTEROZOIC CONTINENTAL MARGINS, THE PRECURSORS OF NEOPROTEROZIC MARGINS BY J.H. STEWART 2009 Explanation TAM KAL GA CAP OS COR Y NAP KM WA CC AL OTT CAN NI SEW TO NG TAS CU GE AM AD OF ALB KOA DA OT ZA LI MO WC QU ANS EAS AR KOP HER CAM LH SR RA SAP PRA SNT CEI SON EAG HI KAN NA QI OL KH KI YO CE BAV PAT YE TU IG TAY CAR HEL AU LUB TRE SOU TE SAX UM PE BA VA KO CAS SEB TRM LU LA EAO DIAMICTITE-BEARING UNIT (middle and late Neoproterozoic, includes glaciogenic rocks of Sturtian (ca. 700 Ma); Marinoan (ca. 635 Ma); and Gaskiers (ca. 580 Ma) ages. Rock consists of a mixture of small to large clasts set in a mud and sand matrix (diamictite). Commonly associated with clastic and carbonate rock including fine-grained turbiditic rocks with large-sized clasts. Diamictite is generally considered to be glaciogenic. On map, the diamictite-bearing unit is shown within areas of the carbonate and siliciclastic unit as well as in small areas outside of these map areas. In these small areas, the diamictite-bearing map unit includes both the carbonate and silicilastic unit and the diamictite-bearing unit EVAPORITE-BEARING UNIT (middle and late Neoproterozoic, may include Cambrian rocks). Widespread surface and subsurface deposits in the Arabian Peninsula, Iran, and to a lesser extent in Pakistan and India. Consists mainly of evaporate rocks interstratified with dolomite, sandstone, shale, and local volcanic rocks PAN-AFRICAN, BRASILIANO, AND RELATED ROCKS (middle and late Neoproterozoic, mostly considered to be 870 to 550 Ma). Widspread rocks in Gondwana continents (Africa, South America, Madagascar, Arabian Peninsula, India, and Sri Lanka). Predominantly medium- to high-grade gneiss, metasediments, migmatites, and sparse granulites intruded by voluminous granitoids. Mostly remobilized older Precambrian rocks. Small circle pattern indicates high-grade metamorphic rocks and granitoids and x's indicate relatively small post- or syn-metamorphic granitoids. Major belts of sedimentary rock, such as that of the Congo belt of west Africa, are not here grouped with the dominantly high-grade metamorphic rocks but with sedimentary rock of the carbonate and ciliciclastoc unit RELATIVELY LARGE, GRANITOID BODIES ASSOCIATED WITH PAN-AFRICAN, BRASILIANO, AND RELATED ROCKS (middle and late Neoproterozoic) CARBONATE AND SILICICLASTIC ROCKS (middle and late Neoproterozoic, includes some Cambrian rocks in Antarctica). Widely distributed. Fragmentary continental margin deposits circumscribing or lying near the boundaries of Laurentia, west Africa, Baltica, Siberia, south China, India and adjacent Himalayas. Includes miogeoclinal shelf deposits on continental margins, as well as intracontinental deposits MAFIC DIKE SWARMS (middle and late Neoproterozoic). Major dike swarms and associated intrusives; 723 Ma Franklin dike swarm and intrusives in Canada; 827 Ma Gairdner dike swam in Australia; and lsesser dike swarms along the southern margin of Siberia, in Norway, in the northwestern United States, and locally elsewhere MAFIC AND ULTRAMAFIC ROCKS (middle and late Neoproterozoic). Large area of outcrops in central Asia and East Africa Orogenic Belt and sparse elsewhere, mainly at continental margins MAGMATIC ARC ROCKS (middle and late Neoproterozoic). Structurally complex assemblages of mafic to felsic, generally calc-alkaline meta-igneous and meta-volcanoclastic rocks associated with interocean, back-arc, and continental margin settings. Commonly contains slivers of mafic or ultramafic rock AREAS INFERRED TO BE UNDERLAIN BY CRATONS AND SHIELDS OF PRE-NEOPROTEROZOIC AGE LINE ALONG TREND OF NEOPROTEROZOIC CONTINENTAL MARGIN THAT FOLLOWS TREND OF MESOPROTEROZOIC MARGIN NEOPROTEROZOIC CONTINENTAL MARGIN. Dashed where inferred MAJOR NEOPROTEROZOIC CONTINENTAL MARGIN DEPOSIT (Miogeocline). Arrows indicate extent and direction of thickening of the miogeocline. Neoproterozoic rocks in Scotland, Ireland, and Svalbard are considered to be continental margin deposits, but facing direction of presumed miogeocline is uncertain GRENVILLE-AGE (Mesoproterozoic) IGNEOUSAND METAMORPHIC ROCKS. Post-Grenville continental margins commonly follow trend of Grenville-age rocks U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Manuscript approved for publication September 3, 2009 ANTARCTICA
