... within the Cree sub-basin where Athabasca Group sediments consist of the Lazenby Lake Formation overlying a thick package of the Manitou Falls (MF) Formation. The Manitou Falls is an upward-fining succession of texturally to chemically supermature, fine- to coarse-grained quartz arenites interbedded...

... outline: high-grade ore zone (U >500 ppm). Abbreviations: LL, WP, LzL,MF, Uc are Locker Lake, Wolverine Point, Lazenby Lake,Manitou Falls Formations, and unconformity, respectively. ...

... with a moderate amount of clay intraclasts and mudstone interbeds. Sequence 3 is subdivided into the Lazenby Lake and Wolverine Point formations. The Lazenby Lake Formation, approximately 460 m thick, is further divided into the Hodge, Clampitt, Shiels, Larter, and Dowler members. The Hodge member is a very...

...Fig. 1. Location and regional geologic framework of the Athabasca Basin (after Card et al., 2007a , b ; Jefferson et al., 2007 ; Ramaekers et al., 2007 ). Abbreviations: AB = Athabasca Basin, C = Carswell…, D = Douglas, FP = Fair Point, LL = Locker Lake, LZ = Lazenby Lake, MF = Manitou Falls...

...) granule and pebble beds as is the Dunlop Member (MFd), which is also a relatively clean, medium- to coarse-grained sandstone but contains a significant quantity of clay intraclasts ( Ramaekers et al., 2007 ). Sequence 3 comprises the Lazenby Lake and Wolverine Point Formations. Quartz arenite...

..., lakes on the Table Head tend to be fewer and are larger and rounded where the limestones are horizontal, whereas the dolomites are poorly drained with many more lakes with straight shorelines ( Figs. 6 , 7 ). The Goose Tickle Formation, a flysch ( Williams, 1971 ), is so poorly drained...

...: the Manitou Falls c and d (MFc, MFd), Lazenby Lake (LzL), Wolverine Point a and b (WPa, WPb), Locker Lake (LL), and the Otherside (OS) Formations (Table 1 ). This sedimentary succession is covered by recent glacial sediments. Table 1. Lithostratigraphy of the Athabasca Basin (after Ramaekers et al...

... ( Fig. 12 ) show a thin layer of glacial till lying above a sandstone succession consisting of Locer Lake, Wolverine Point, Lazenby, and Manitou Falls D and C formations. The EXTECH-IV program (see later in the text) has subsequently provided a comprehensive description of the lithostratigraphic...

... to Calymmian in age ( Bosman and Ramaekers 2013 ; Gradstein et al. 2012 ; Ramaekers et al. 2007 ). The preserved sedimentary record includes the following formations, in order from oldest to youngest: Fair Point, Smart, Read, Manitou Falls, Lazenby Lake, Wolverine Point, Locker Lake, Otherside, Douglas...

... . 2007 ; Bosman et al . 2012 ). Abbreviations: B = basement, C = Carswell, D = Douglas, F–O = undivided Fair Point to Otherside formations, FP = Fair Point, LL = Locker Lake, LZ = Lazenby Lake, MF = Manitou Falls (b = Bird, c = Collins, d = Dunlop, r = Raibl, w = Warnes), O = Otherside, RD = Read, S/M...

...), sandy Collins (MFc), and clay-intraclast–rich Dunlop (MFd) members in the east and center of the formation, the sandy Warnes Member (MFw) in the southeast, and the pebbly sandy Raibl Member (MFr) to the northeast. Sequence 3 includes the Lazenby Lake Formation (conglomeritic Hodge, sandy-muddy Clampitt...

... Falls formations, (3) Lazenby Lake and Wolverine Point formations, and (4) Locker Lake, Otherside, Douglas, and Carswell formations ( Fig. 1 ; Ramaekers et al., 2007 ). Most of the units at present consist of fluvial quartz arenitic sandstone, with the exception of the Fair Point Formation (debris...

... formations, FP = Fair Point, LL = Locker Lake, LZ = Lazenby Lake, MF = Manitou Falls (b = Bird, c = Collins, d = Dunlop, r = Raibl, w = Warnes), O = Otherside, RD = Read, S/M = undifferentiated Smart and/or Manitou Falls, W = Wolverine Point. The map grid coordinates are given in the UTM, North American...

... Lazenby Lake and mud-rich Wolverine Point formations (sequence 3), and the pebbly to sandy and conglomeratic Locker Lake, sandy Otherside, mud-rich Douglas, and dolomitic Carswell formations (sequence 4) ( Ramaekers et al. 2007 ). The western part of the basin is underlain by basement rocks belonging...

.... Overlying the Read Formation is the Manitou Falls Formation, which is dominated by quartz-rich arenites of fluvial origin. Sequence 3 is represented by Lazenby Lake Formation quartz arenite and Wolverine Point Formation interbedded mudstone and tuffaceous quartz arenite. Dating of zircon from tuffaceous...