I’ll have photos with fantastic fall colors and really delicious folds in garnet mica schist for ye soon…ish. In the meantime, here’s a bit of a photo I’ve had saved up to show ye! I’m going to present anonymous crops of it first, because I want to give you a chance to see if you can puzzle out what it is. Because it’s a fairly famous landmark, I’m only going to say it’s sandstone, it’s in a European country, and the photo these bits are from is on Wikimedia Commons, available under a Creative Commons license. Why not the whole picture? Because that would give it away instantly! I mean, all you’d have to do is Google it (don’t Google it, that takes all the fun out of the game).
Now: can you tell me what made the cave, and the marks in the ceiling?
Here’s a close-up of the ceiling:
I’ll reveal the full picture, the photographer, and the answer tomorrow. It is so delicious!
Houllay in Luxembourg! Going to look up the scratch marks, now.
Water.
Obviously made by Cthulhu.
I think that’s the only valid answer, considering I’m having trouble finding information on the striations (I’m probably searching wrong). Scratches left by Cthulhu it is.
Hi Dana! Super-long time lurker here. :) Speaking of mystery geology, I have a few interesting slide pictures from WA if you’re interested.
Surely! Send ’em to dhunterauthor at gmail. Thank you – I can’t wait!