What is a rock mine?
I can't find anywhere else to ask this question, so pardon the off-topic instrusion.
Re: "County takes heat over buying land near air base"
Can anyone explain to me what a "rock mine" is? Seems like mines, by definition, are "rock mines." Is this another way of saying rock quarry? Or is it a gravel pit? If not, what kind of rock does one mine on the West Plains? If there's a big market for basalt nowadays, I guess I missed it.
Zelda