> 2 Nanoxite Stones
> Scrap of Paper
> Business Card
> Fire Extinguisher
> ISO Officer's Cap
> Leather Briefcase
> I.D. Card
> Silver Key
> Crank
> Pet Snacks
> Employment Papers
> Passcard (CQ20024)
> Gold Key
> Pickaxe
> Matches
> ISO Access Form
> Passcard (CQ30021)
> Peryolitium Key
> Wrench
> Washcloth
> Violations Report
> Passcard (CQ60537)
> Vault Key
> Noise Filter Headset
> Round Pot
> Experimental Results Papers
> Supply Room Card
> Dragon Key
> Knife
> Small Mirror
> Beetle Analysis Papers
> Mine Access Card
> Crowbar
> ISO Energy Pulse Gun
> Sleeping Pills
> Peryolitium Shell Diagrams
> OSA Card
> Light Tube
> Tranquilizer Gun
> Tranquilizer Spray
> ISO Accident Report
> Izacladia Access Card
> Radio Receiver
> Military Uniform
> Golden Necklace
>
> The most recent thing I have done is fix the mining cart
> wheel with the wrench. Now I am stuck.
>
> I notice that everyone else seems to have at least 5
> Peryolitium Shards (the ones I had were traded for
> dynamite, and some miners confiscated another) but I can't
> find any more, despite repeated searching.
>
> I also can't find any stalacite or pillar areas. I drown in both
> the streams. I have made a sort of map of the area I've
> covered so far, but everywhere on it leads to a dead end or
> back to the exit.
>
> Please be as spoilerish as possible with advice/help,
> because I have already read all the help posts I can but
> none of them make any sense (for my situation).

well, I notice you have the crank. Have you used it, to open all the barriers ? once you have them all open, you need to take a ride, in the mine cart.
I can't really be specific, about the ride, my post would just be deleted.
there are many many posts, about where to jump off, but first you have to get yourself into postion for the ride, by having your barriers opened.
hope this helps !