There have been some great geopuzzles coming out of the ever-growing geoblogosphere the last few months.
I've got another one.
We all have hundreds or even thousands of photographs that, to the non-geologist, look like we are showing off our favorite hammer, pencil, or unidentified hand. The first thing we learned on our first field trip was to include a scale in your photograph. Nature has that pesky tendency to create self-similarity.
So ... here we go ... below is a photograph with scale context cropped out. While it may not be too difficult to get a *general *sense of scale, I'm looking for someone who can tell me precisely how tall that vertical black line is (lower right of photo). What do you win? Nothing really ... I still don't have those Clastic Detritus t-shirts made.
Good luck!
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