My understand is that more and more soil scientists are discovering the power of rock powders in relation to soil building and building the health of all soil organisms.
All rock powders are great sources of minerals and micronutrients. All animal forms need minerals. As the microbes and macrobes like earthworms, digest the insoluble minerals, they break down into the various soluble micronutrients that all forms of plants need.
For example, limestone rocks are rich in calcium. Granite rocks are rich in potassium, etc. Seaweeds of course are the king of micronutrient fertilizers and soil amendments. There can be up to 70+ trace elements in seaweed.
For larger farms, or for farming systems where seaweed is not readily available in mass, rock powders is one answer to the problem. I have access to truck loads of free rock powders (called "fines"), here at a local limestone quarry here in central Alabama, if I ever needed it for my farm.
It is amazing how more and more research is proving that insoluble tiny particles like rock powder minerals, can be easily digested or absorbed via microbial activity, over time, into the anatomy of growing plants, thriving in the presence of rich organic compost, and other forms of powerful biostimulants like aerobic compost teas, or etc.
The entire Kingdom of God can be totally explained as an Organic Garden (Mark 4:26)