Friday Rock Blogging, Mailbag Edition
Reader JM sent in today’s rock, with the assertion that it is an anomaly from the western Utah desert and not, in fact, the sort of thing you might find in a three-year-old’s nose. There is nothing in the photo for scale, but it is ~3″ long.
Here’s what I can say about this rock: wherever it came from, it’s clearly been rolling around as a cobble for a long time. I bet its P-wave velocity is 3-5 km/s. But of course the most interesting things to the casual observer are those wacky stripey inclusions – are they biogenic? Are they some kind of wacky depositional something? Being as I am a wacky hybrid of geohydrologist and seismologist, and not really a proper geologist at all, I have no idea.
Gentle readers, I am entertaining speculations from the silly to the sensible – what’s up with this rock?