Vernon County,  Missouri 

“The Gilfillian Quarry  in the NW. ¼ NW. ¼ sec 31, T.35N., R.31W., shows what is apparently excellent stone.

The bottom of the pit is now filled with water and the quarry has not been worked for many years.  The rock outcrops down the ravine to the northeast for a thickness of at least 30 feet and on the surface appears to be good stone. 

There is a tendency for the sandstone to case-harden by migration of the iron content to the surface through leaching…..Much of the stone was shipped to Kansas City and used in large buildings.  It showed a tendency to disintegrate by weathering and practically all of it had to be replaced.”

Source: The 1926 Geology of Vernon County, p.116