Cow dung bomb

There are some words in geology that graphically describe features we see in the rock, but few are quite as illustrative as cow dung bomb (sometimes known as a cow pat bomb).  It is a type of volcanic bomb - igneous rock ejected from a volcanic eruption but t does have an unusual form resembling .... well you can guess.  Most volcanic bombs cool in the air, creating a distinctive aerodynamic shape (see below).  Cow dung bombs are more liquid and actually land still largely molten, giving them their distinctive shape.

Where do you think we could find cow dung bombs?