|
|
Gneiss
Sept 26, 2018 16:03:43 GMT
Post by Tringa on Sept 26, 2018 16:03:43 GMT
One of the few rocks I can identify.
A nice piece of Gneiss
Dave
|
|
|
|
Gneiss
Sept 27, 2018 18:45:54 GMT
Post by duncan74 on Sept 27, 2018 18:45:54 GMT
Hi Dave,
Your lump of Gneiss has quite a few bands of quartz through it, formed by extreme heat and pressure, Gneiss rocks that originate as sedimentary rock are called paragneiss and those originating as igneous rock are called orthogneiss,
Duncan
|
|
