rock (friday foto finder)


Once again, Archie has kindly hit on a theme that is very well represented in my photo library. This week calls for “rock.” Continuing down my path-filled path of the last few weeks, I felt this was a good opportunity to show another path. This was a section of a path I went on during my wonderful hike with YTSL of Webs of Significance–now shockingly over a year ago!

Most of the trails we went on during our hike were not paved, but there were a few stretches that were. The rocks¹ in the path below were quite interesting. Many looked like they had patterns, which looked to me a lot like the fossils of ferns. However, I’m not convinced they are. In the 3rd photo you can see very linear cracks in the rocks with the dark fern-like patterns appearing to be growing out from the lines. I’m intrigued, and would love to learn more about what might have caused this. Anyone more versed in geology² than I am?

A stretch of path paved with flat stones somewhere on the Sai Kung Peninsula of Hong Kong.


Don’t these patterns look like ferns?


But look at the very straight-lined cracks, and how the dark fern-like patterns seem to grow from them.

¹Really, I’d be more inclined to call them stones, but you know. Theme.
² Geology rocks. It had to be said.³
³ Actually, I do really like learning about rocks. We collect lots of rocks in this house.

5 thoughts on “rock (friday foto finder)

  1. Hi Alejna —

    It *is* more than a year now since you visited, isn’t it? I got to thinking that as it’s finally turning cooler here in Hong Kong and I remember how hot it was the day we went hiking,.. ;)

  2. Nice! I like how you have a bit of a meta-theme going in this streak of Friday Fotos. Those ferny patterns are beautiful. I agree that they are probably some small planty sort of thing actually growing on the stones. It looks like a nice place for a hike–so lush! In fact, it’s neat to see the ferns growing next to the path, and their shapes echoed on the stones.

  3. So a term came to me this morning after I woke up: dendritic inclusions. What’s funny is that I first googled dendrite, and on finding that it is a part of a neuron, thought “that can’t be right.” But there is also a use of the term in geology. Check out these pyrolusite dendrites in limestone, and the following discussion:

    Pyrolusite is MnO2, and often grows in these beautiful branching forms. It’s totally an inorganic process, but the visual similarity to botanical branching makes pyrolusite dendrites a particularly insidious form of pseudofossil.

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