Regarding Rock-id and mineral-id questions. Status:
There remain some 370 closed but non-deleted rock id questions. The meager 5 delete votes* per day of the people trying to move them out of sight do not seem to help much in bringing this number down.
(Additional new ID question are closed quickly and then pop up in this list as well; the Roomba will remove those because they have no answers).
If you go to your moderation tools page it is easy to see the ones that already have at least one delete vote, and you can quickly add an additional vote.
We currently have 47 2k+ users.
* Higher rep users (over 10000k?) have 14 delete votes
Update 8 november 2018
Sorry people, I stop all my 'moderation' activities on this site.
The mess about pronouns and Monica makes me no longer want to contribute to maintenance.
Good luck with getting rid of these closed questions (list is down to 284 now!).
BTW I just incorrectly voted to reopen a fossil ID questions, but it will probably not survive the review queue ;-)