<p>I didn't dispute that certain forms of igneous rock could be used for building materials, but I also don't know that they're somehow "superior" to other forms of rock. Like I said, I haven't really had much time to look up detailed information on igneous rock.
</p><p>Though I can't find any source that says those aren't examples of it. Wikipedia, Encyclopedia Britannica,
Indiana.edu,
Geology.com, & some place called Sandatlas certainly seem to think they are.
</p>
<div class="quote"><i>Yes, he cooled the lava down and made so a wall. Wasn't it that way?</i></div>
<p>Yes, but I'm saying there are important differences in the way that rock wall was formed other than the type of rock it was made of.
</p>