Related by context. Frequent words. (Click for all words.) 60 Powder River basin 59 Lower Magdalena 59 Permian basin 58 Rocky Mountain Mid Continent 58 Appalachian basin 58 KINSHASA Congo Fabulous 58 Sand Wash 58 Flin Flon Greenstone Belt 57 Wattenberg Field 57 unconventional reservoirs 57 Eureka Trend 57 Athabasca oilsands 57 Paradox Basin 57 NGL fractionation facilities 57 hydrocarbon reservoirs 57 Orogrande Shear Zone 57 Deseado Massif 57 basins 57 dolomitic 56 eastern Athabasca Basin 56 Quesnel Trough 56 unpatented lode claims 56 Incahuasi 56 Arkoma Basin 56 Athabasca basin 56 subalpine 56 molybdenum tungsten 55 Geologic mapping 55 unlined pits 55 palaeochannel 55 Post Glenn Asakawa 55 Comstock Lode District 55 Saskatchewan Athabasca Basin 55 formation BIF 55 Canada Sedimentary Basin 55 lifts ROCKIES COLORADO Arapahoe 55 By Sarah Trotto 55 tributary rivers 55 Transantarctic Mountains 55 Hoidas Lake 55 Riou Lake 55 sedimentary basins 55 Nordegg 55 rift basins 55 volcaniclastic rocks 55 Barnett Shale formation 55 Middle Awash 55 Pasquia Hills 55 depositional 54 By PATRICK BAHR 54 leasehold acreage 54 bitumen extraction 54 Otish Basin 54 Piceance Uinta Basins 54 Ungava Bay 54 BY WENDY PITLICK Black 54 Athabasca Basin Saskatchewan 54 Nikanassin 54 Canadian sedimentary basin 54 Uinta Basin 54 Zacualpan 54 Cardium horizontal 54 lode mining 54 ARM INC. 54 VMS Belt 54 Thelon Basin 54 Coalbed methane 54 Delineation drilling 54 Kuparuk River 54 JM Reef 54 Montana de Oro 54 Ntaka Hill 54 salars 54 Lower Tertiary 54 prolific Sierra Madre 54 Haynesville Bossier 54 Glauconite 54 sulphide deposits 53 By KENT MINCER 53 diatomite 53 Toiyabe 53 uraniferous 53 Chattanooga Shale 53 Washakie Basin 53 Montney formation 53 greenstone belts 53 Upper Jurassic 53 By GEOFFREY BEW 53 breccia pipes 53 Costayaco field 53 surface geochemistry 53 West Pequop 53 Monument Butte 53 shale basins 53 ultramafic rock 53 andesitic 53 coastal lowlands 53 northern Chile Atacama 53 Front Range Briefs 53 Niobrara shale 53 Kurupung Batholith