This journal is mostly public because most of it contains poetry, quotations, pictures, jokes, videos, and news (medical and otherwise). If you like what you see, you are welcome to drop by, anytime. I update frequently.

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med_cat: (SH education never ends)
med_cat: (SH education never ends)

Fulgurites: fossilized ligtning strikes

Jul. 2nd, 2015 at 6:06 AM
med_cat: (SH education never ends)



Fulgurite: fossilised lightning strikes

Fulgurites form when lightning strikes the ground and almost instantaneously melts the silicate minerals it contacts. The melt then rapidly cools leaving a hollow tube with a glass rim behind, often with other sand grains stuck to the surface. These tubes mimic the shape of the lightning as it passed into the ground creating the spectacular geometric pattern seen in these fulgurites.

- Watson

Further Reading:
http://bit.ly/1FCC2xb

Image credit:
Ken smith http://bit.ly/1F3Z1iV
yoyoj3d1 http://bit.ly/1AXiAOQ

(from the Earth Story FB page)
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Comments

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[identity profile] earthspirits.livejournal.com
Jul. 2nd, 2015 02:51 pm (UTC)
What an amazing photo! And it's fascinating to learn - hadn't heard this before. Thanks for sharing, Cat!
med_cat: (SH education never ends)
[personal profile] med_cat
Jul. 2nd, 2015 04:22 pm (UTC)
It is amazing, isn't it? Never heard of this before, either--that FB page often has fascinating stories and photos. The page admin really does a remarkably good job.

Pleased you found it of interest!
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