Johnnyrockit
Newbie
- Dec 19, 2019
- 1
- 5
- Primary Interest:
- All Treasure Hunting
Have you seen such minerals?
Attachments
Upvote
5
Do you know? Have you seen,?
- Thread starter Johnnyrockit
- Start date
Argentium
Gold Member
- Feb 2, 2008
- 9,058
- 5,574
- Detector(s) used
- Whites, MXT.
- Primary Interest:
- All Treasure Hunting
Welcome to T-net Johnny ! That's quite a cluster
of crystals !! I think if you scroll down the Forum
page you'll find a sub forum dedicated more to gems and minerals - that might get your answers pretty quick . It is fascinating to realise that all crystals conform to one of only six crystal systems ! So someone will see it and get back to
you .
of crystals !! I think if you scroll down the Forum
page you'll find a sub forum dedicated more to gems and minerals - that might get your answers pretty quick . It is fascinating to realise that all crystals conform to one of only six crystal systems ! So someone will see it and get back to
you .
Jason in Enid
Gold Member
- Oct 10, 2009
- 9,593
- 9,229
- Primary Interest:
- All Treasure Hunting
Westfront called it right. They are Basalt pillars. They form from the crystalized magma in a volcano core. There are many examples around the world. The "devil's tower" in Wyoming is on well known formation.
Ponchosportal
Full Member
- Nov 19, 2004
- 234
- 251
- Primary Interest:
- Other
Columnar jointing is a geological structure where sets of intersecting closely spaced fractures, referred to as joints, result in the formation of a regular array of polygonal prisms, or columns. Columnar jointing occurs in many types of igneous rocks and forms as the rock cools and contracts.
Professor of Engineering
Gold Member
Awesome! I would liked to have found/recovered those beauties! 
1637
Bronze Member
look up devils postpile in ca.
brad
brad
As stated, columnar basalt.
Kray Gelder
Gold Member
- Feb 24, 2017
- 7,013
- 12,578
- Detector(s) used
- Fisher F75
- Primary Interest:
- Metal Detecting
A drive along the Columbia River in Washington State is highlighted by the basalt flows, many of them showing columnar jointing.
Over a great period of time, from about 17 million years ago up to 6 million years ago, a serious amount of lava flowed from huge fissures over what we now call the Yellowstone Hot Spot, and flooded parts of Idaho, Washington, and Oregon. The flows are up to 900 meters thick in the Clearwater region of Idaho.
This shot is along the Columbia River.
Each layer represents a separate eruption.
Over a great period of time, from about 17 million years ago up to 6 million years ago, a serious amount of lava flowed from huge fissures over what we now call the Yellowstone Hot Spot, and flooded parts of Idaho, Washington, and Oregon. The flows are up to 900 meters thick in the Clearwater region of Idaho.
This shot is along the Columbia River.
Each layer represents a separate eruption.
