What is the meaning of the word Fossicking?

intransitive verb. 1 Australia and New Zealand : to search for gold or gemstones typically by picking over abandoned workings. 2 chiefly Australia and New Zealand : to search about : rummage. transitive verb.

What is the meaning of mullock heap?

Mound of loose stones left over from gold mining operations: People say there is still gold in the mullock heaps that the early gold miners left behind.