Bonusituation said:

Some of that was discussed a bit earlier. Do you want to elaborate on it?

I'm wondering why exactly those high ring walls are needed around the "temples"?

Perhaps they are ancient blast walls.  Perhaps the temples, at one time, were ships that took off (as theorized above) but over thousands of years the complex has fossilized.

I believe the scenes that show a giant dust storm coming is actually something catastrophic happening at the temple.

Thoth said:

I'm sure somebody has already mentioned this before, but maybe the ampules contain uniquely dangerous species that the SJ have either captured from other worlds, developed on their own, or possibly some combination of these.

Maybe the SJs consider themselves the most dangerous species in the galaxy and anything that challenges that status is up for elimination.  However, in the process, the keep samples of their defeated enemies.  These are kept in ampules and placed as an offering before the great head. 

Also, I think it's clear now that the head is a representation of the SJs.

JasonDiaz said:

Great head had me rolling but you might be correct, perhaps that's what RS means by uncivilized behavior. Also note that no matter how technological advance a society becomes or how religions they become also proves that douchebaggery exists outside our solar system.

Has anyone speculated on what the holographic markers are picking up on the upper levels? There is one heading up the central shaft from what appears to be the top of the Head room but another appears to be  spiralling upwards a level at a time. Does it show several levels with concave floors or something else? There are dark horizontal lines on the surface of the dome which match up to the green scanned areas.

The red orbs represent the position of the laser mapping balls. There are three at ground level; one off to the left, one to the right in the foreground (which seems to have discovered an external door) and one at the right in the background (at the end of a tunnel), all travelling outwards from the centre. There is one at the top of the shaft and another between that and the ground floor.

The three on the ground floor have uncovered lots of rooms; some dome-on-dome shaped others are barrow shaped along with tunnels. The uppermost red orb seems to be travelling up a central shaft but the other one is either spiralling around the upper levels or possibly mapping the outside of the dome.

I really have no idea about the upper levels, if there were rooms or tunnels I would expect the hologram to look something like the ground floor. To me it looks like each level has a dished floor like a giant bowl stretching across the entire area.

It really does look like several layers, which would reinforce the notion that they are artificial (perhaps even prefabricated) structures.

I think the Head Room is right there in the middle - just follow the central shaft down to it. It has two sets of 'ribs'; the outer ones on the wall and about six to eight inner columns which are standalone.

There is a crude shape that could be the Head monolith in the central room on the hologram.

I think that this is a while into the mission after doors have been opened, it looks like most ot the orbs are at the end of their travels. Funny that we can only see the markers for Fifield/Ford and Milburn though.

As for the covering of the dome, could it have been covered with rock as a form of protection or a crude disguise? There is a thought niggling away the the whole set up is a ruse somehow, perhaps to decieve either a third species or the prometheus crew.