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Geopuzzle: What’s the scale?

March 18, 2008

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!


11 Comments leave one →
  1. March 18, 2008 10:32 am

    My guess would be 1 cm, but I’m also betting that the scale is misleading. I’m not sure if we’re looking at something
    bigger or smaller.

    Why’s the apparently fine-grained stuff white? There’s something weird there…

  2. March 18, 2008 11:28 am

    I’ll go for 1 m, just for variety. Do you have a larger photo you could put up, or would that make it too easy to guess?

  3. March 18, 2008 12:02 pm

    You’re both wrong … the only clue I’ll give at this point is that it’s somewhere in between 1 cm and 1 m … but you probably knew that already :)

  4. Alec permalink
    March 18, 2008 12:56 pm

    I think I’ll say that it’s 3cm.

  5. March 18, 2008 1:10 pm

    10 cm?

  6. March 18, 2008 6:58 pm

    somewhere between 1cm and 1m… I think I will split the difference 0.5 m??

    Scale sure helps with the interpretation of an image. This could be the atmosphere of Jupiter or a cross section at a beach.

  7. March 18, 2008 7:02 pm

    Ed is getting closer …

  8. March 19, 2008 1:39 am

    30 cm.

  9. RCFon permalink
    March 19, 2008 4:49 am

    It looks like an oil tainted sand deposit. I would guess 5cm for scale.

  10. March 19, 2008 4:50 am

    Answer is up here … thanks for playing


  1. Geopuzzle: What’s the scale? (ANSWER) « Clastic Detritus

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