In addition to what other posters have said, chemotrophic bacteria can play a significant role concentrating/enriching certain metallic ores by eating dissolved minerals in deep groundwater and metabolizing out metals. Lots of vein-gold runs through very old & fractured marble/granite bedrock with a lot of hydrologic activity.
In 2013 Reddit accidentally revealed the most “Reddit Addicted City” was Eglin Air Force Base. A city with a pop of 2.8k getting +100k visits. Neat.
The 2nd most popular city from that list, Oak Brook Il, is the HQ of Elsevier, a data analytics company & DOD subcontractor.
The Research Lab at Eglin AFB was cited in a 2014 paper on how to influence social groups to converge to a “common desired state”
It’s been a decade since. How far do you think they’ve come?