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Schenk Off Leash Man
Joined: 16 Apr 2012 Posts: 2372 | TRs | Pics Location: Traveling, with the bear, to the other side of the Mountain |
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Schenk
Off Leash Man
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Wed Nov 22, 2017 9:42 am
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When it comes to crystals, most folks don't karat all, unless they are precious.
But this is very cool and informative, thank you.
Nature exists with a stark indifference to humans' situation.
Nature exists with a stark indifference to humans' situation.
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Jake Robinson Member
Joined: 02 Aug 2016 Posts: 521 | TRs | Pics
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Brushbuffalo wrote: | Without being there or seeing more photos my educated guess is those are small, very uniform contraction columns in a deformed bed such that the columns are lying on their long axis. |
That's fascinating. I've seen columnar basalt before at Frenchman Coulee and remember being struck by how the columns were nice neat polygonal shapes with perfectly flat faces. Very cool how such things can form in nature. By the way, Aaron got a photo that better shows the scale of that outcrop on Mystery:
Mount Mystery summit. Photo by Aaron Wilson.
He also got a photo of some interesting rock on nearby Hal Foss Peak:
Hal Foss Choss. Photo by Aaron Wilson.
And speaking of Olympic Mountain pillow basalt, am I correct in assuming that's what this is? Taken near the summit of Mount Constance:
Constance rock. Pillow basalt in the light on the left side of the picture?
This is a very cool thread, thanks Brushbuffalo!
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IanB Vegetable Belayer
Joined: 21 Jul 2010 Posts: 1061 | TRs | Pics Location: gone whuljin' |
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IanB
Vegetable Belayer
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Wed Nov 22, 2017 10:04 am
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"Forget gaining a little knowledge about a lot and strive to learn a lot about a little." - Harvey Manning
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DIYSteve seeking hygge
Joined: 06 Mar 2007 Posts: 12655 | TRs | Pics Location: here now |
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DIYSteve
seeking hygge
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Wed Nov 22, 2017 11:14 am
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Jake Robinson wrote: | He also got a photo of some interesting rock on nearby Hal Foss Peak:
Hal Foss Choss. Photo by Aaron Wilson. |
I've seen similar shattered rock in other places, e.g., Bailey Range ridgetop N of Bear Pass. I surmised (perhaps incorrectly) that it was some sort of frost-shattered metamorphic rock, maybe schist
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pushkarwallah Member
Joined: 07 Aug 2014 Posts: 46 | TRs | Pics
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the thread rocks. keep them coming!
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ale_capone Member
Joined: 22 Sep 2009 Posts: 717 | TRs | Pics
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ale_capone Member
Joined: 22 Sep 2009 Posts: 717 | TRs | Pics
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Thanks Rock Star!
Sorry, my words dissappeared. And I can't find the natural pics I have. Not sure how the rocks feel about being part of my landscape, but they look content. I think if they try to escape, IL just let them go though.
Location. East side Stevens pass. Backside of ski Hill. Tye mill road. The creek on the immediate West of ' the burn '. Creek runs from the road, to a small waterfall just above the power lines.( can't find photo)
Creek is entirely boulders of the swirly patterned rock. Tried to find a photo of the water, as it's exposed bedrock.. Have also found garnets not to far from there, embedded like the rock near grizzly peak.
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Brushbuffalo Member
Joined: 17 Sep 2015 Posts: 1887 | TRs | Pics Location: there earlier, here now, somewhere later... Bellingham in between |
Jake Robinson wrote: | the columns were nice neat polygonal shapes with perfectly flat faces |
In your original image, look toward the right third and you can see several polygonal surfaces facing right. Furthering the hypothesis of these forms being contraction columns, these would be the ends of columns whose long axis is horizontal.
Mount Hal Foss rock looks like slate. It is common especially in slate for it to break into these pencil-like splinters.
Your final picture, Jake, shows good pillows from a distance. Yes, that part of the Olympics has got 'em! They form by fluid lava erupting either under deepish water or flowing on land into water. There are good videos available showing their formation live.
Passing rocks and trees like they were standing still
Passing rocks and trees like they were standing still
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Brushbuffalo Member
Joined: 17 Sep 2015 Posts: 1887 | TRs | Pics Location: there earlier, here now, somewhere later... Bellingham in between |
Amazing pillows, ale_ capone.
Kilauea?
Looking closer, it tricked me! Those are individual cobbles or boulders that as you explain are now held captive in your yard with no immediate prospects for escaping. Can't tell size, which distinguishes cobble from boulder.Then I read your note and you confirm it.
That's a rock I would want to pick up and handle to identify with total confidence, but I believe the weird boulder/cobble is graphitic mica schist that was mechanically-weathered as part of the stream's bedload. Google 'schist' for images. Note the 'stripes', a characteristic of schist due to foliation. That texture, which looks like sedimentary layering, is due to linear or platy minerals (like biotite mica) that became oriented due to directed ( unbalanced) pressure during metamorphism in the crust.
A further clue is there is an extensive area of exposed schist in that region from which these clasts could be derived.
Passing rocks and trees like they were standing still
Passing rocks and trees like they were standing still
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ale_capone Member
Joined: 22 Sep 2009 Posts: 717 | TRs | Pics
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Ha. Sorry, I didn't read the add something for scale disclosure. That particular one is a baby boulder, about the size of a soccer ball. There is a maple leaf, and blue fescue grass blades on the sides.
In the creek, they range from pebbles, to immovable by two men..
Always found them a bit.strange because most everything else is more granite like in that area. Still combing old photos for the waterfall. I'd feel silly if put or somebody just dumped them there.
Unfortunately, I can't lift more then ten pounds for the next month, or I'd bring it to the social.
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Jake Robinson Member
Joined: 02 Aug 2016 Posts: 521 | TRs | Pics
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Adam (Gimpilator) wanted me to share this on his behalf. He took it on Bare Mountain in Nevada (36.842643, -116.674074).
Shell fossils in Bare Mountain rock
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Brushbuffalo Member
Joined: 17 Sep 2015 Posts: 1887 | TRs | Pics Location: there earlier, here now, somewhere later... Bellingham in between |
Jake and Adam,
Good scale, a bit out of focus.. edit actually perfectly sharp focus. My initial view was with my tablet being weird
From the fragments I see, these are some kind of bivalve, such as a clam or brachiopod.
Unfortunately, I'm a poor paleontologist. A good one would give you the genus and species.
Rock is almost certainly limestone.
Passing rocks and trees like they were standing still
Passing rocks and trees like they were standing still
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Gimpilator infinity/21M
Joined: 12 Oct 2006 Posts: 1684 | TRs | Pics Location: Edmonds, WA |
Thanks Doug. Jake told me there was a rock topic going on. What a fun idea! I asked him to post for me because I'm without a real computer for awhile and can't do much with this darn phone.
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HitTheTrail Member
Joined: 30 Oct 2007 Posts: 5452 | TRs | Pics Location: 509 |
Great idea!
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GC99 Member
Joined: 25 Jun 2015 Posts: 32 | TRs | Pics
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GC99
Member
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Thu Nov 23, 2017 11:21 pm
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radka wrote: | Oh, I have one for you!
I found this gem at the saddle of Blackcap in the Pasayten last year. I carried it to the summit and put it on the top of the summit cairn - it may still be there.
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Radka,
That greenish rock you posted looks to be Fluorite. It is present in the quartz porphyry dikes of the area. There were even some claims staked on Monument Peak years ago to mine the stuff, but nothing ever came of it. These small deposits are all over that area, with some many prominent ones on Dot Mountain. Great find!
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