Interesting Geology

[Turtle]

Originally Posted by Turtle

45º 56' 41" N
122º 16' 28" W
Elevation: 838 Feet

...We also collected some samples, which I have in plastic bags, and as soon as practical I plan to make some high-res scans @1200dpi so we can better see the component particles.

Well, scanning at 1200 dpi works as long as I don't expect to post it. Here's a suitably sized snippet of varve collected from about 6 feet above road level; scale divisions 1/64th inch.

[Turtle]

I think I have the GoogleEarth marked now with the location of the varve I have been describing. Can I get some feedback on if the file below attached works to take you to the site? Takk.

Mmmm...the new setup does not allow .kmz files as attachments. Here's the thread instead at GEC: >> Google Earth Community: Varves - glacial lake sediment deposits

That is all.

[Turtle]

Further up road #54, past the varves, we stopped for a scenic overlook and there I found on the roadcut a very different rock & formation. What I found was a pyroclastic eruption deposit, and I made a short video of it. Sadly, I don't seem to have made a record on the GPS. Here we go then; gettin' on with gettin' 'er done.

YouTube - Pyroclastic Deposit

[Turtle]

This video is taken of the varve at the 3rd location I gave, 45º 55' 34" N, 122º 13' 32" W, Elevation: 1122 Feet. It has a different character from the first, and notice a very wide band just above the midway point; I think this is a volcanic eruption deposit. Also notice, if not chuckle at, how I flinch when the gunshot up the road goes off!

Onward...................................

YouTube - Extreme Varving 2

[Thunderbird]

Hey Turtle come out out of your shell and in front of the camera and narrate for me what im am seeing. please...

[Turtle]

Originally Posted by Thunderbird

Hey Turtle come out out of your shell and in front of the camera and narrate for me what im am seeing. please...

I'm in front of the camera & narrating in the varve measurement vid.

I have to do more practice editing before I can add a narration, but the large cobble I reach for is an ice-rafted erratic that is embedded firmly in the deposit. In the earlier Extreme Varving video, I dig out 2 such erratics. (Racoon has them & is doing clean-up).

Feel free to ask for any clarification, but let's not forget that a turtle out of its shell, is a dead turtle.

[Thunderbird]

Originally Posted by Turtle

:

Feel free to ask for any clarification, but let's not forget that a turtle out of its shell, is a dead turtle.

I wonder if one could genetically reverse engineer a turtle to be born without a shell.

I would hold it, and fed it, and make it my little reptile/puppy friend.

[LaurieAG]

Originally Posted by Turtle

I think this is a volcanic eruption deposit. Also notice, if not chuckle at, how I flinch when the gunshot up the road goes off!

Hi Turtle,

You didn't flinch that much.

I found the following on wiki

Initially, varve was used to describe the separate components of annual layers in glacial lake sediments, but at the 1910 Geological Congress, the Swedish geologist Gerard De Geer (1858-1943) proposed a new formal definition where varve described the whole of any annual sedimentary layer. More recently introduced terms such as 'annually laminated' are synonymous with varve.

Have you ever come across any spherically exfoliating siltstone?

[Turtle]

Originally Posted by Thunderbird

I wonder if one could genetically reverse engineer a turtle to be born without a shell.

I would hold it, and fed it, and make it my little reptile/puppy friend.Attachment 2210

We are not amused. Well, a little maybe.

Originally Posted by Lauriama

Hi Turtle,

You didn't flinch that much.

I found the following on wiki

Have you ever come across any spherically exfoliating siltstone?

An annually laminated formation by any other name, would still taste like dirt. I missed that congress; out with the flu if I recall.

No round flaking sedimentary rocks that I recall coming across in the Gifford Pinchot. It rings a dim bell though; perhaps I ran across such a matter in a lab.

On the vid of the pyroclastic deposit, I think it is more likely from Mt. Adams or one of its field vents/cones rather than from St. Helens. I'm going to have a closer Google of it.

[Racoon]

Muy Excellente Turtle-san.

You can still scale and manuever varves with the best of them!

The "rock" that you pulled from the layers is apparently Not a rock, but more like a chunk of compressed clay. It didn't wash clean, and it fractured quite easily...
Strange.