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by lorney
1dave Avatar

I doubt pet wood fires produce much heat, so it had to burn before petrifying, and it burned on all surfaces so it was most likely standing during the conflagration that was just surface material.

Why didn't the coal agatize?


#7. 92 Ma - JET - Petrified (Coalified) Wood. “Jet is a product of high pressure decomposition of wood from millions of years ago, commonly the wood of trees of the Araucariaceae family. Jet is found in two forms, hard and soft. Hard jet is the result of the carbon compression and salt water; soft jet is the result of the carbon compression and fresh water.”

During the 15th and 16th century it became fashionable to give Mourning Jewelry of black and white stones to relatives of the deceased
Mourning jewelry made of Jet (182 million year old early Jurassic, from Whitby, North Yorkshire, England) reached its height of popularity in England after the death of Prince Albert in December 1861. Queen Victoria went into deep mourning, which was imitated by her subjects when faced with their own bereavements.
Jet jewelry made a comeback with all the flu deaths and the first World War in 1918, and was adopted by the Flappers of the 1920's.

In 1916-18 Tiffany & Co of NYC heard of Jet being discovered near Hanksville Utah and purchased most of the entire production until supply finally overran demand in 1926.
In Utah it is found in two Cretaceous Rock Formations, The Dakota Sandstone and the Straight Cliffs.

Haanksville Jet

“Jet, a gemstone variety of lignite coal, occurs near the top of the Cretaceous Dakota Sandstone
approximately 1/2 mi north of the study area in the SE1/4 sec. 22, T. 30 S., R. 10 E. (Gese, 1984b). Jet was produced from this area from 1919 to 1925, however, no jet is known to occur within the study area.

Geology and Mineral Resources of Garfield County, Utah 1957 - Page 159
“Jet Coal. Small amounts of jet coal are located ln the Straight Cliffs Formation which outcrops in the Right Hand Fork of Collet Canyon (Carcass Canyon quadrangle) on Smoky Mountain Road between the towns of Big Water on US 89 and Escalante on Utah 12, west of the Kaiparowits Plateau. The jet coal is found as coalified branches or pieces of branches completely enclosed in clay beds.
The best jet locality in the state of Utah is just north of the Henry Mountains in an area known as Jet Basin (Wayne County). The Jet Basin coal is found in a similar host as that in Garfield County, but the branches are flattened. Continued digging could expose additional logs or branches of this material. Jet coal is a shiny material that breaks conchoidally with a smooth surface. It can be polished into black jewelry. Jet has not been fashionable for many years.
More: pubs.usgs.gov/bul/1274j/report.pdf

From Utah 24 in Hanksville, turn south on 100E which continues as Sawmill Road as it leaves town. Continue south for about 6 miles. Turn right just before crossing Dry Wash (signed "Dugout Bench, Birch Creek"). Continue 4.2 miles to another junction. turn left and continue for 5.3 miles. Park close to the lower end of the knoll on the right side of the road. Find a trail down into the basin and walk about 0.5 miles to begin looking for jet. The jet occurs below a 6 inch coal bed.
That’s a lot to take in. Thanks for the info. I will read through it and see what I can figure out. 

by perkins17
jasoninsd Avatar
perkins17 Avatar
Those are some very nice cabs Jason. Crazy lace is really nice material as well, one of my favorites. Starguy sent me a couple slabs of it a while back, and I've been drooling over the dogtooth lace since I got it, waiting for inspiration to strike on the shapes. This helped! :) How's "Frankenfinger" holding up?? ;)
Thanks Perk!  :)

Crazy Lace was my first "love" when it came to rocks other than Fairburns...but it's now in the third place - right behind Teepee Canyon Agates! LOL

I'll be watching for what you do with yours...you've really been improving A LOT on your cabs!

Thanks for asking about Frankenfinger! LOL - It's amazing how much I use that exact spot when I'm cabbing. It's been weird to try and hold the dop and cab differently from what I'm used to. Once in awhile I forget and try to do what's "natural" and I NAIL that spot...it quickly reminds me it's not even close to healed! LOL

Crazy lace was mine too! It was the first slab I ever bought, from a friend of mine named Perry who lives really close to my house (in fact, I bike around his area a lot!) and occasionally had big sales. I'll be sure to post them. I got three done today, but didn't get around to posting them. Thank you so much! I think the fact that I'm not cabbing in weather that I can see my breath in helps "a little" lol. I totally understand, whenever I'm injured, suddenly that spot needs to get used a lot (same with sickness!). I couldn't survive without cabbing right now, so I know the saying "where there's a will there's a way" works real well in this contest. Hand/finger pain is the absolute worst! I had trigger finger surgery (after two steroid shots. *shiver*) so I totally understand how uncomfortable/painful stitches and healing are. I had dissolving stitches and they still hurt real bad. Not a huge fan of hand wounds, nope. :)
by saxplayer
Nice, Jason! Make sure to put a few on the macro thread :)
by jasoninsd
rockjunquie Avatar
jasoninsd Avatar
It was a talented dinosaur...it was doing Trix!  :D

You just couldn't resist could you??!!  LOL!

I have to grow old...but I don't have to grow up!  LOL

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mohs: Jun 30, 2022 10:25:42 GMT -5
mohs: what would happen if space collapses Jun 30, 2022 10:28:21 GMT -5
rickb: “Oh, Rooster-Booster, the sky is falling! The sky is falling!" (scared011) Jun 30, 2022 10:33:15 GMT -5 *
mohs: (sunshine) Jun 30, 2022 10:34:31 GMT -5
rockpickerforever: What would happen if space collapses? I'd say we would never know, because it would happen so quickly, our slow brains would not even begin to register it. POOF!!! Jun 30, 2022 11:27:39 GMT -5 *
Wooferhound: We are due for a big Hemorrhoid Strike Jun 30, 2022 11:33:07 GMT -5
mohs: I like puff -its on the horizon (wise) Jun 30, 2022 11:35:20 GMT -5 *
mohs: doctor suggested sand baths for those Jun 30, 2022 11:42:37 GMT -5
rickb: pucker up buttercup Jun 30, 2022 11:58:31 GMT -5
mohs: time for brunch Jun 30, 2022 12:06:35 GMT -5
parfive: Wouldn’t mind a heads up from Hubble or Webb or Sagan’s ghost.
Might as well relax and enjoy it.
Jun 30, 2022 13:03:54 GMT -5
parfive: Where does The Big Guy hang out after he wrecks the joint?
. . . or was it Le Grand Seppuku?
Jun 30, 2022 14:23:58 GMT -5
amygdule: The Oregon State Hospital, Junction City, Oregon Jun 30, 2022 14:28:47 GMT -5 *
parfive: Lake Mead 1043.14 aka minus 186. Jun 30, 2022 14:35:01 GMT -5
mohs: The best solution would be for the U.S. Army Corps of Engineers to build an aqueduct from the Old River Control Structure on the Mississippi to Lake Powell, fill it, and then send more water from there down the Colorado to fill lake Mead.

Jun 30, 2022 16:10:05 GMT -5 *
Lumberlegs: Best solution don't build multiple metropolis in the desert. But I live in the land of the lakes...mostly Jun 30, 2022 18:20:23 GMT -5 *
vegasjames: They keep blaming the drought here when really a big part of the problem is all the uncontrolled building. The use enormous amounts of water to keep dust down when demolishing old buildings, then even more goes in to all the concrete and cement. Jun 30, 2022 18:41:42 GMT -5
vegasjames: Yet, now they want to build yet another stadium just after building several others. Then there are all the man-made lakes for the rich, the massive fountains etc. Lake Mead is dropping at around 8 inches a day and the lake is only averaging just over 200 Jun 30, 2022 18:43:32 GMT -5
vegasjames: feet right now. I calculated it out and at this rate, Lake Mead can be dry within a year. And they still want to keep building. Jun 30, 2022 18:44:20 GMT -5
mohs: I agree. Dry water is coming. (tumbleweed) The only other solution is all these people go back somewhere wet. Bye Jun 30, 2022 18:59:19 GMT -5