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Minnesota apophyllite on calcite
  
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John Nash




Joined: 24 Jun 2011
Posts: 34
Location: Minneapolis, Minnesota

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PostPosted: Oct 19, 2011 21:46    Post subject: Minnesota apophyllite on calcite  
We (son Greg and I) had a most remarkable find in a roadcut just south of Lutsen, Minnesota. There had been some fresh blasting and we happened by at the right time. There was a single flat, round vug about 40cm across full of pocket mud. Embedded in the mud were calcite crystals, many of which had apophyllite "pyramids" growing on them. Large calcite, never mind clear, well-crystallized apophyllite is unusual for Minnesota. I've attached a couple pictures.

1739full3.jpg
 Description:
Calcite, Apophyllite
Onion River roadcut, Lutsen Township, Cook County, Minnesota,
3.5 X 3 X 3 cm
Apophyllite on calcite showing clear to white apophyllite faces.
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1739full3.jpg
1739close1.jpg
 Description:
Calcite, apophyllite
Onion River roadcut, Lutsen Township, Cook County, Minnesota
3.5 X 3 X 3 cm
Close-up of apophyllite on calcite, apos are about 4 - 5 mm
 Viewed:  8026 Time(s)

1739close1.jpg
1737full1.jpg
 Description:
Calcite, apophyllite
Onion River roadcut, Lutsen Township, Cook County, Minnesota
9 X 7 X 6 cm (approximately)
Two large calcites sort of wrapped around each other, both with a few apophyllites gracing them. A surprising gift from the lavas of Minnesota's North Shore
 Viewed:  8036 Time(s)

1737full1.jpg
1737full2.jpg
 Description:
Calcite, Apophyllite
Onion River roadcut, Lutsen Township, Cook County, Minnesota
9 X 7 X 6 cm (approximately)
Another view of these lovely entwined crystals.
 Viewed:  8028 Time(s)

1737full2.jpg

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GneissWare




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PostPosted: Oct 19, 2011 22:56    Post subject: Re: Minnesota apophyllite on calcite  
Nice find, John.
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Jordi Fabre
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PostPosted: Oct 20, 2011 01:06    Post subject: Re: Minnesota apophyllite on calcite  
GneissWare wrote:
Nice find, John.

I agree!

Why not publish these interesting specimens in: "A mineralogical trip through the states of USA - Minnesota" -> https://www.mineral-forum.com/message-board/viewtopic.php?t=1664 ?
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