When you take the tour at Grand Caverns in VA, the guide tells you that the
cave has more cave shields than any other in the world. Don't know if that
is true, but there are probably hundreds. Someone counted a few years ago
when it was resurveyed, but I can't remember the number was. Some are pret
Some folks say shields are rare. I've found them rare regionally. In
some regions, and some caves in particular, they are amazingly abundant
and large. For example, Grand Caverns, Virginia, and some caves in China
come to mind. In other regions they are absent. Cave mineralogists have
different vie
"Some years ago" would be in the 1960-70's. When Carol Hill described
them in her first Cave Minerals book we thought they were mostly known
in one of southern Arizona's caves which was also compared to the
Caverns of Sonora. Several of us from TX made a trip to see this new
speleothem. It
