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Submit your Halloween pumpkin pics to /r/horror's carving competition!

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all 6 comments

[–]LessLipMoreNip 2 points3 points ago

FYI, Svartifoss roughly translates to the black waterfall

[–]Betanut 1 point2 points ago

Beautiful, I wonder what causes that rock formation. Seems almost crystalline.

[–]Tagedieb 1 point2 points ago

I have seen something similar in Northern Ireland. Appearantly it has to do with a slow cooling process of lava.

[–]Random 1 point2 points ago

Columnar jointing in basalt.

Caused by slow cooling from a planar interface.

Minimal energy configuration of tension cracks as the volume decreases is a series of cracks that meet at 120 degrees... i.e. hexagons. These grow downwards as the mass cools.

If the cooling is uneven, they become disordered.

They are common in mafic sills, but can also be found in thick tuff successions - there are fabulous ones at the Power Station Gorge north of Bishops, California, for ex.

The Northern Ireland ones are the most famous.

[–]AndThatsWhyIDrink 0 points1 point ago

INB4 some guy replicates this in Minecraft.

[–]ComputerSavvy 0 points1 point ago

Don't quote me but it looks like Basalt.