David K. Joyce

Recent Activities -Keuhl Lake, Page Two

Zircons are used for age dating rogs in terms of geological time. The study of geochronology. Most people don't realize that the Zircons from Keuhl Lake have been used as the standard around the world for geochronological studies.
Here are a few more pictures.

 

Recent Activities -Keuhl Lake, Page Two

This piece has one larger, well formed zircon crystal and a number of crystal sections. As well, you can see there are casts of much larger, once present, zircon crystals in the feldspar!

Recent Activities -Keuhl Lake, Page Two

The fluorescent zircons show up nicely in SW U/V light.

Recent Activities -Keuhl Lake, Page Two

I cracked one piece of feldspar open to find a 44mm long, stout zircon crystal inside!

Recent Activities -Keuhl Lake, Page Two

Again, this large crystal exhibits excellent fluorescence.

Recent Activities -Keuhl Lake, Page Two

David and Ray leave the mine area across the bridge. Beautiful day!

Recent Activities -Keuhl Lake, Page Two

Daniel always seems to be in the lead on the way out through the pine forest.