s in the Belcher (Sanikiluaq) Islands . These rocks are about 2 billion years old. The width of the bottom of the photo is about 5 metres.
General geology The geologic units of the Belcher Group, which forms the Belcher Islands, were deposited during the
Paleoproterozoic. Combined with other Paleoproterozoic units that occur along the edge of the
Superior Craton, the Belcher Group forms part of the
Circum-Superior Belt. From youngest to oldest, the Belcher Group is composed of: • Loaf Formation (
molasse) • Omarolluk Formation (
flysch) • Flaherty Formation (
flood basalt) • Kipalu Formation (
iron formation) • Mukpollo Formation (
sandstone) • Rowatt Formation (
shallow water carbonate) • Laddie Formation (deep marine
red bed) • Costello Formation (carbonate slope deposit) • Mavor Formation (
stromatolite reef complex) • Tukarak Formation (
shallow water carbonate) • Fairweather Formation (
shallow water carbonate) • Eskimo Formation (
flood basalt) • Kasegalik Formation (
sabkha) The oldest part of the Belcher Group, the Kasegalik Formation, was deposited between 2.0185 and 2.0154 billion years ago. The Kasegalik Formation also contains the oldest unambiguous
Cyanobacteria microfossils. Much of the Belcher Group strata were deposited under intertidal to shallow-water conditions, although the Mavor Formation formed a platform margin stromatolite reef complex, and the overlying Costello and Laddie formations represent slope and deep basin deposits, respectively.
Soapstone The occurrence of very high-quality
soapstone in the Belcher Islands supports a locally significant carving industry. These soapstone occurrences formed when sedimentary rocks of the Belcher Group were
intruded by Haig sills and dykes approximately 1.87 billion years ago. ==Flora==