The nuggets being found all over pilbara could be: 1. Someone...

The nuggets being found all over pilbara could be:

1. Someone putting there intentionally, companies borrowing nuggets from each other (haha)
2. Nugget rain
3. Washed by rain from gold bearing rocks
4. ?

Some hint folks The reason companies are pegging every inch in Pilbara

The Kaapvaal Craton (centred on Limpopo Province in South Africa), along with the Pilbara Craton of Western Australia, are the only remaining areas of pristine 3.6–2.5 Ga (billion years ago) crust on Earth. Similarities of rock records from both these cratons, especially of the overlying late Archean sequences, suggest that they were once part of the Vaalbara supercontinent (Zegers et al., 1998).
(courtesy wikipedia obviously)

By the way gold in Kaapvaal Craton represents half of the gold ever mined on earth.