November 20, 2008: Whole Lotta Hole

[glatt]

It's really cool how smooth/straight that hole is. I'm no geologist. There's probably some simple explanation for how it was formed, but I can't imagine what that would be.

[barefoot serpent]

Originally Posted by glatt

There's probably some simple explanation for how it was formed, but I can't imagine what that would be.

Limestone rock (soluble) + water (slightly acidic) + time (millions of years) = karst topography

[footfootfoot]

Originally Posted by glatt

It's really cool how smooth/straight that hole is. I'm no geologist. There's probably some simple explanation for how it was formed, but I can't imagine what that would be.

Tunnelling like that is usually caused by small clumps of baking soda or baking powder which weren't properly sifted. That is why it is important to sift all your dry ingredients, especially if they are clumpy.