Crater lake was produced when a stratovolcano collapsed, creating the crater.
<span>The answer is : Both have true necks, while eusthenopteron has no neck. </span>We know that tiktaalik is more closely related to acanthostega than it is Ichthyostega eusthenopteron because Tiktaalik and Acanthostega both have true necks while eusthenopteron has none.
Animal dander would be the answer you're looking for.
Hope this helps :)
I believe that it is a reverse fault
