Early Proterozoic ice-proximal glaciomarine deposition: The lower Gowganda Formation at Cobalt, Ontario, Canada Mustard, P. S. ; Donaldson, J. A. Abstract Publication: Geological Society of America Bulletin Pub Date: 1987 DOI: 10.1130/0016-7606(1987)98<373:EPIGDT>2.0.CO;2 Bibcode: 1987GSAB...98..373M