Hamersley Basin

…Australia, studied deposits in the Hamersley Basin and found that individual thin layers could be traced for more than 100 kilometres. Such continuity suggests that evaporation played a major role in precipitating both the iron minerals and the silica. A second remarkable feature of Lake Superior-type deposits is that they…

…are also encountered in the Hamersley Basin of Western Australia, in east-central Finland and the adjoining part of northwestern Russia, near Lake Baikal in Siberia, and in central India, suggesting the occurrence of a wide-spread glaciation.