Sinkholes are cylindrical or conical depressions with steep limestone walls, found in karst rockland areas.
2.
It is 550 m long and starts, at its northern end, with conical depressions only a few centimeters deep.
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Every element of its skeleton not found in a concretion bore many closely spaced ovualar conical depressions ranging in diameter from and deep.
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In the lower part there is a large conical depression which ends with a big rectangular hole maybe made to secure the base.
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The body is cylindrical with a concave conical depression, instead of a dome-shaped lens at the tip, to cause wider distribution of light.
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About 20 % of the hadrosaur's bones were enveloped by calcareous concretions but every single bone not found in a concretion bore many closely spaced ovualar conical depressions.
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In terms of the space it takes up in, erm space, is a black hole actually spherical, or is it more like a conical depression / whirlpool with the singularity at the bottom ?-- talk ) 21 : 51, 24 November 2009 ( UTC)
8.
:The conical depression is just a way to visualize the gravity well it doesn't mean that is actually how it occupies three dimensional space . ( No more than the Sun actually exists in a little depression talk ) 22 : 13, 24 November 2009 ( UTC)
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