Washington Green Sandstone (Eocene Swauk Formation)
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- čas přidán 6. 10. 2023
- This video features the sandstone, trade named Washington Green Sandstone (using 360 degree photography). This stone is from a small quarry on a forest road between Liberty and Blewett Pass, Washington State, USA. This stone was used in downtown Portland, Oregon, in a couple small store fronts, and perhaps in the Cle Elum and Ellensburg areas in Washington. I would guess that the quarry operated during the 1960s by Jack Kirsch.
The Washington Green Sandstone was used in relatively few structures, and certainly does not compare to the three most popular architectural sandstones in Washington State--Chuckanut, Wilkeson, and Tenino. However, because of the general green color, the Washington Green Sandstone could be confused with the greenish-color Chuckanut sandstone (Chucknut Formation, Bellingham area, Washington).
The arkosic sandstone is part of the Swauk Formation, in Kittitas County, Central Washington. It was quarried locally in part of a erosion resistant, tilted monolith of sandstone and conglomerate--along US Forest Road 9712. The Swauk Formation is a Sixty million year old sedimentary rock that formed in a Eocene basin. It was later intruded by the Teanaway dikes, about forty seven million years ago. The following paper appears to describe the general area of the quarry site: www.cwu.edu/academics/geograp....
Other than for minor use as a building stone, and for containing some fossils, the Swauk Formation has little economic use. The intrusions of the Teanaway--within the Swauk--has been quarried as aggregate materials.
Hello Rock People! This is Dave the Geology Dude. Please be aware that the only way to really learn rock identification, is to have hands-on experience. This is because visual experiences alone do not show properties like hardness, acid reactivity, density, and the range of variables that are common to each rock type. Don't forget that Geology isn't Rocket Science--it's Rock Science! Please "like" and subscribe to this CZcams channel!
Music (CZcams Audio Library): Sea of Sand (by Ethan Meisxell)
Copyright by David Knoblach, 2023. All rights reserved
Hello Rock People! This is Dave the Geology Dude! There is more to this video than just a spinning rock. There are detailed notes in the description area of this video. If you want more, longer length rock identification videos are on my CZcams homepage. Check them out, or leave a comment here!
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Thx!
This stuff is all over my property. 😅
Oh wow. There is certainly a lot of this stuff if you are in the area where it is dominant.
@@GeologyDude Central Washington
I’m in the Seattle area. I collected that sample in the early 1990s from the guy who used to operate that quarry. It’s a beautiful area. That is why I wanted to check out your channel too! I liked it!
@@GeologyDude I'm 2hrs from Seattle on Blewett Pass 8 miles from Dryden.
@@jackblackpowderprepper4940 that’s a great area. I love visiting the museum in Cashmere, and the Wenatchee area