When it comes to limestone formed by glaciers millions of years ago, who knows or who cares about the tiny differences in color or pattern? Well, Bill Ford did. When it came down to the tiniest detail ...

Under the hills and valleys of Carroll County geologists find an odd assortment of rocks – products of earth’s complex geologic history. limestone, a sedimentary rock, is one we have in abundance.

It turns out that the very stones used to build the Alamo came from the San Antonio Zoo. Alamo officials on Thursday confirmed that limestone from a historic quarry that once existed at the zoo’s ...