Photograph courtesy of Sid Perkins, who retains the copyright.
Named for Crab Orchard, Tennessee, which in turn is named for groves of crabapple trees, the rock first reached national prominence in the 1920s. Prior to that, it had mostly gone into flagging, sills, and foundations. According to a 1961 report by the U.S. Bureau of Mines, large scale quarrying started around 1926, when architect Henry Hibbs sought stone for Southwestern University in Memphis. Several quarries still produce the stone, which in 2001 went into and onto the Country Music Hall of Fame, in Nashville.
Photograph courtesy of Sid Perkins, who retains the copyright.
The Crab Orchard is a beautiful sandstone ranging in color from tan to blue gray with shades of yellow, pink, purple, and brown. Adding to the appeal, the colors appear as lines and swirls, many of which form geometric patterns. Dense and fine-grained, it is “relatively impervious to moisture, and comparatively inert to acid or fumes encountered in manufacturing areas,” or so wrote the Bureau folks in 1961. They also observed that dirt and soot could be readily washed off. What more could one want?
Photograph courtesy of Sid Perkins, who retains the copyright.
Some controversy exists about deposition of the Crab Orchard stone. Some geologists propose that it occurred in braided streams and some that deposition took place in “back-barrier, tidal flat, and tidal channel or delta sub-environments within a barrier or marine-dominated deltaic system.” But all agree that deposition took place in the Pennsylvanian.
Looks a lot like the formstone used in Baltimore: http://en.wikipedia.org/wiki/Formstone
Formstone is an architectural style of a faux stone.
I heard this type of colors in stone can only been found in crab orchard, is it true?