"Iron Blow" at the Linda goldfield

The point under discussion is the origin of the "formation"" known as the " Iron Blow," the oxidised portion of which was described by Mr. Thureau as " volcanic mud or ash." Mr. Johnston, however, from close examination on the spot, and from the " internal evidence " yielded by specimens, etc., has attributed to this a non-volcanic origin. Includes discussion by Mr. W. F. Ward, Government Analyst.