Granular convection

What is wrong with this picture?


Random wall somewhere between Mölln and Hamburg

Don’t you guys make your parents stop the car when you drive by newly built walls in random villages somewhere when they are a perfect example of what the Paranuss-Effekt (Brazil nut effect, or granular convection, for all you non-german-speakers) does NOT look like?

For comparison, this is what it SHOULD look like:

2015-10-13 20.25.37

My emergency snacks. Why is it always so hard to get the sunflower seeds out of a jar of mixed nuts?

Yep. Granular convection!

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