Basal silty Member

Geology

Group: McKay

Formation: Survey Peak

Lithologies: "shale" (11), sandstone (4), conglomerate (5), grainstone (3), "limestone" (36), dolomite (6)

Paleoenvironments: marine indet. (8), carbonate indet. (7), shallow subtidal indet. (29), open shallow subtidal (4), deep subtidal indet. (4), transition zone/lower shoreface (5)

Age range: base of the Trempealeauan to the top of the Tremadocian or 492.50000 to 477.70000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Furongian497.0 - 485.4Canada (Alberta) (229379 229380)
Sunwaptan493.5 - 487.5Canada (Alberta) (11077 11078 11079 11080 11081)
Trempealeauan492.5 - 485.4Canada (Alberta) (54119 54120 54121 203762 203763 203777 203778 203779 203780 203781 203782 203783 203784 203785)
Ibexian487.5 - 470.0Canada (Alberta) (229378)
Tremadoc486.5 - 477.7Canada (Alberta) (11033 11036 11034 11037 11038 11039 11040 11044 11045 11046 11047 11048 11049 11050 11052 11059 11060 11061 11062 11063 11064 11065 11066 11067 11068 11069 11070 11071 11072 11073 11074 11075 11076 54122)
Tremadocian485.4 - 477.7Canada (Alberta) (229377)