Dave Bressan has posted a call for submissions for the next Accretionary Wedge:
What remains to be discovered for future earth scientists what we (still) don’t know about earth? What are the geological riddles that still lack answer – all questions are allowed – it could be a local anomaly, or a global phenomena, or something strange…(Naturally you can also include a possible answer to your problem).
Submissions are due by September 20; leave a comment with a link to your posts either on his blog at the above link. He also provides an e-mail link if you don’t deal well with commenting.
I’ll also reiterate his mention that we’re looking for hosts and themes for October and beyond.