 The beds of ‘puddingstone’ are complexly interbedded with layers of massive diamictite and laminated and graded argillite and sandstone.It likely accumulated as turbidites and submarine slumps within a submarine fan or outer slope environment within a deep rift basin submerged by marine waters.Jasper conglomerate, which is also denominated "pebble jasper conglomerate", "Saint Joseph Island puddingstone", "Drummond Island puddingstone", or "Michigan(ian) puddingstone", occurs in Saint Joseph Island and the vicinity of the Saint Mary's River, north and northwest of the Bruce Mines of Northern Ontario, Canada, circa east of Sault Sainte Marie, Ontario.