12 He is angry with us for our having come out of the cave, without His order; and for our having done so of our own accord, without consulting Him, when we left the cave and came to this place."
13 Then Eve said, "If, indeed, the earth quaked for our sake, and this rock forms a tent over us because of our transgression, then we will be sorry, O Adam, because our punishment will be long.
14 But get up and pray to God to let us know concerning this, and what this rock is that is spread over us like a tent."
15 Then Adam stood up and prayed before the Lord, to let him know what had brought about this difficult time. And Adam stood praying like that until the morning.
* The word "dome" is used here but the text does not specifically suggest that the covering was round—only that it covered them on all sides, however a dome is the most likely shape that would have be able to withstand the impact with the ground. From verse 9 that says "when they saw it" and verse 11 that says "shut us up in this prison", we can conclude that the dome had holes in its sides that were big enough to let in light and air but were too small to allow Adam and Eve to escape. Another conclusion would be that the holes were large but too high up for Adam and Eve to reach, however the former is more likely.
** In verse 7 of the next chapter (XLIX), God tells Adam and Eve that the ground was also lowered under them—"I commanded … the rock under you to lower itself".
Chapter XLIX - The first prophecy of the Resurrection.
1 Then the Word of God came and said:—
2 "O Adam, who counselled you, when you came out of the cave, to come to this place?"