1972-D Errors on reverse I havent seen before. What is this?

I found this while roll hunting. The last 3 columns shrink at the top. The 1st two are tilted I think. Or is it that the lincoln statue is crooked? The initials are spotted different as well.

So what kind of error is this? What would it be worth?

 

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The cause is most likely a Worn Die or Late Die Stage, Or debris in die.
Very common.No value added.
In fact this kind of thing can make a coin less desirable due to it not being a nice completely struck coin. Note lack of details in memorials steps.
http://www.error-ref.com/

 

A Worn Die would cause this minor error. No additional value to this type of error as they are common place.