The Aliens' Walls

Visionary Alpha
MemberOvomorphDecember 03, 20122817 Views2 RepliesIn [u]Aliens[/u], there was a secreted resin that was said to be left behind by the xeno-morphs, and it looked like walls they built. What was this, anyone? What was its purpose?
In addition, I notice that in [u]Prometheus[/u] the walls look a lot like this. Could the xeno-morphs on LV-426 have carried some memories of those places, such that they wanted to make their new surroundings remind them of "home"? And in [u]Prometheus[/u], is it more of their secreted resin we see all along the walls, suggesting the presence of hundreds or even thousands of them?