Viking Formation, Joffre Field, Alberta: shoreface origin of long, narrow sand body encased in marine mudstones

The Formation consists of cross-bedded glauconitic sandstones encased in bioturbated marine mudstones and siltstones. Apparently, 1) the linear nature of the field is due to its formation along the shoreface, 2) sediment was not transported across the shelf, and 3) relative sea level fluctuations and consequent shifts in the position of the shoreface control the location of the reservoir sand body. -from Authors