Friday, 31 March 2017 23:00

Rocks of Ages

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They are truly for the ages, these outcrops of Roaring Fork Sandstone, taking us back to the late-Precambrian times of 500+ million years before the present. And because they are such tightly bound layers of fine-grained, highly feldspathic sandstone, they are, indeed, hard. They exist as part of a massive sandstone complex known as the Ocoee Supergroup and are the lowest member of a subgroup called the Snowbird Group. True to the extensive, almost unimaginable, warping of these old hills, Roaring Fork Sandstone can be found in diverse locations like Sevier and Cocke Counties in Tennessee, and Haywood and Madison Counties in North Carolina. Where it breaches the surface in Greenbrier in Great Smoky Mountains National Park, it interfaces with Middle Prong of Little Pigeon to create beauty beyond words. I never tire of being where it is. A focal length of 17mm, definitely wide-angle, gave me the angle-of-view I wanted. An aperture of f/11, given the camera-to-foreground distance, was sufficient for depth-of-field; thankfully, because at ISO 100, even at this opening, a shutter speed of 30.0 seconds was necessary to give me a slightly-darker-than-medium exposure. The cleft in these old layers of stone has always seemed that it was made for  me, but I am more than happy to share it.

Read 737 times Last modified on Sunday, 07 May 2017 08:19
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  • Comment Link Donald McGowan Thursday, 06 April 2017 11:31 posted by Donald McGowan

    Good morning Dianne and Nancy T. I really appreciate both of you joining me for this conversation. You never know when you offer something for discussion how the response will run; but obviously all Images do not resonate equally with everyone. Occasionally folks will write me a note personally rather than posting a comment on the blog, and this week someone sent a note to tell me that this Image was a bit weird and that the rocks looked like elephant skin. Isn't it interesting how changes in perspective influence how we "see" the natural world. It's an opportunity to sit back and appreciate that even as we are all unique in our perceptions, those perceptions will not necessarily be received positively; but we can all advocate positively for our art.
    Hi Dianne. I hope all is well in Louisiana. Yes, we were here together. It's one of those wonderfully iconic Smokies streams that offers so much to so many. I'm glad it brings back good remembrances, and that it resonates so positively with you. Walk in Beauty.
    Hey Nancy T., it's interesting that you should ask about a dome. I'm not sure that there was one over these mountains; but as the mountains arose more than half a billion years ago, they pushed up strata of rock that had been buried deeply for millions of years, and so they were in some ways domes for what lay beneath. I am so excited we will have you with us for the Smokies adventure next week. What's going on in the Park right now is amazing. See you soon.
    While I thought that this perspective of these ancient rocks was quite interesting, not everyone seems to have agreed. I still like it and will continue to think about how I might offer it differently at some future time. Thank you both for being with me.

  • Comment Link Nancy Tripp Sunday, 02 April 2017 22:59 posted by Nancy Tripp

    I am anxious to get back to that part of the Smokies. It's been a while. This rock looks like it is from another planet. It looks like it might have been discarded modeling clay from a giant child's toy box. Do you think there was ever a dome over the mountains?

  • Comment Link Dianne Sunday, 02 April 2017 22:17 posted by Dianne

    I recognize this! Memories.... Just beautiful Don, and one of my favorite places too.

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