|
Gwinnett County Norcross Quadrangle |
Specimen Photographs:
"Prehnite
- Dravite - Hornblende"
![]()
|
Photograph - Dr. David
Babulski
![]() (Above and below) Prehnite nodules in vugs lined with chalcopyrite crystals coated with greenish tan chlorite. Specimen extracted from a large quartz lens in coarse grained amphibolite. |
|
Photograph - Dr. David
Babulski
![]() Prehnite nodules and greenish tan chlorite. |
|
Photograph - Dr. David
Babulski
![]() Dravite variety tourmaline crystals with quartz. Specimens from a large quartz lens in coarse grained amphibolite. Note this tourmaline is very similar to dravite tourmaline found in veins and veinlets in the adjacent Norcross gneiss. |
|
Photograph - Dr. David
Babulski
![]() Hornblende crystals in quartz. These specimens extracted from a quartz epidote pod exhibiting en echelon fracture. Some of these Hornblende crystals are 0.5 inches in length. |
|
|
[GMHP-HOME] [Wolf
Creek-FORMS] [Geological Setting-Sketch]
[Min. Occurance-Sketch]
[Inst. Anal.] [Site
Photo] [Specimen Photo]
E-MAIL ADDRESS: heritage-project@gamineral.org