Shiprock...

....New Mexico, poking up out of the ground,
the curious rock, under-earth found;
there's not a lot like it, try to understand,
look at the following - it's a lesson plan.

You see the piece called volcanic neck?
that's what we have now, volcano blown to heck,
wait until you see the 'trail' left by the eruption then,
what's left now is a large crack, filled in - not by men.

The bottom two photos show the 'trail' from different angles.  The 'trail' was made by a type of lava blown out by small eruptions, the bottom photo shows how high they are.  So very interesting!
go to -  www.emporia.edu/earthsci/student/kuss1/shiprock.html for more info.  I really like this place.