Californian gold rush 1848 - 1857
Spearmint is well represented with BC's young Golden Triangle which has discovers liberated through global warming. https://www.cbc.ca/news/canada/british-columbia/un-buried-treasure-melting-glaciers-in-b-c-s-golden-triangle-are-revealing-rich-mineral-deposits-1.4795033 AND Californian gold rush: https://www.historynet.com/california-gold-rush AND a video : https://youtu.be/iydRkC0gMZI