Versus: ʻAʻā and Pāhoehoe

Choice: A

Choice: B

Versus

Today on Versus we have a battle of terminology.  I don't want anyone to cheat on this by looking it up.  I just want a straight and honest guess from you first. So close out that Google search and Wikipedia, and tell me.  Which one is  ʻAʻā and  which one is Pāhoehoe.  

Choice A is the Pāhoehoe, and Choice B is the ʻAʻā,

Pāhoehoe:

The main distingusihing factor is that Pāhoehoe is smooth.  This type of lava is very fluid and flows with great ease.  As it moves along the top surface is cooling off.  As the surface cools the lava under it continues to flow outward, creating a smooth surface.  It is also typical for Pāhoehoe to spread outward in small tubes which gives it a very unique shape.

Basically it looks like chocolate fudge making...

ʻAʻā:

What makes ʻAʻā different is it's rough and uneven texture.  ʻAʻā forms at a lower temperature so in many cases you will see a flow start out as Pahoehoe and turn into ʻAʻā.  ʻAʻā contains lots of loose and broken fragments of cooled rock within the flow of molten lava.  As it progresses and cools these fragments remain exposed, creating a very rough and uneven surface.

Basically it looks like rock candy.

There are other types of lava flows as well, including block lava, Coulees, but we will save those for another time.  For now, I just wanted to give you a quick bit of fact to impress one of your friends with.