Help needed regarding this on urgent basis

[raaaf]

Here are the few lines from Barbara Erskine's "Midnight is a lonely place".

"The entrance gaped before her, the darkness intensely black and impenetrable after the luminous dark of the night but she could smell the logs"..

My questions are:

1) What the author means when she says the above lines?
2) Why are these words choosen in particular?

Detailed and urgent answers will be appreciated.. Thanks! :)

[Calidore]

We're not a homework service, sorry.

[raaaf]

:( too sad

[Eiseabhal]

Someone entering a cave where my Neanderthal granny was cooking venison(s) over a log fire. Birch most likely. Night was luminous because the full moon shone on the glistening leaves of primeval forest, the glittering flat surface of the nearby loch, shunned by the Neanderthals because of their belief that a slimy beast rose from its abysmal depths on nights of the full moooon!