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Post by joshuamcduffie on Jan 24, 2020 9:10:19 GMT -5
I stuck close to the road last time, and saw several logging trucks, but only one private vehicle the entire day I was there. I'll definitely give the hunters a wide berth, no reason to go down now, I still have lots of material to work through for now. There's definitely no rock down there worth dying over. It looks like deer season ended January 12.
I took so much I was feeling bad about it, but once I have both barrels rolling on the big tumbler I'll work through it. Maybe next time I'll bring a big sledge, and a pickup truck.
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jamesp
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Member since October 2012
Posts: 36,154
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Post by jamesp on Jan 24, 2020 9:40:28 GMT -5
RickB A chip hit my wife on the leg like 30 years ago. Standing 20 feet away. Not much later a chip needle punctured my knuckle on an artery and pulsed blood. Potential for severe laceration very possible(Joshua). Stony Bluff a long way from hospital... If the boulder sized chunks are glassy and not so grainy they really do break easily with a sledge. One longer more slender glassy boulder was able to be sledged into +/- 6 inch slabs down it's length. But protection from shrapnel is absolutely necessary.
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Fossilman
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Member since January 2009
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Post by Fossilman on Jan 24, 2020 10:14:47 GMT -5
Nice to see some starting to tumble rocks again... About time I drag everything out and start too..
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Post by joshuamcduffie on Jan 24, 2020 20:26:36 GMT -5
RickB A chip hit my wife on the leg like 30 years ago. Standing 20 feet away. Not much later a chip needle punctured my knuckle on an artery and pulsed blood. Potential for severe laceration very possible(Joshua). Stony Bluff a long way from hospital... If the boulder sized chunks are glassy and not so grainy they really do break easily with a sledge. One longer more slender glassy boulder was able to be sledged into +/- 6 inch slabs down it's length. But protection from shrapnel is absolutely necessary. Good advice. I was there by myself last time, and Stony Bluff is a long way from anywhere!
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Post by Pat on Jan 24, 2020 20:33:04 GMT -5
jamesp did you say BRYOZOAN CHERT?? interesting.
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jamesp
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Member since October 2012
Posts: 36,154
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Post by jamesp on Jan 25, 2020 5:21:14 GMT -5
jamesp did you say BRYOZOAN CHERT?? interesting. This thread is all about that Savannah River BRYOZOAN CHERT location Pat. Looks like Joshua is going to have some tumbled Bryozoans soon. Stay tuned !
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jamesp
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Post by jamesp on Jan 25, 2020 5:38:48 GMT -5
You can heat treat this chert easily using a camp fire since you can collect so much of it Joshua. Dig about a 3 foot circle say 5 inches deep preferably in sandy soil. Place chert in layers and backfill over it with chert 2 to 5 inches deep. Build a hot wood fire on top of the buried chert. The fire needs to be big enough and added to enough to keep hot coals in place for a day or two. Or longer. Best to use fire wood sized wood. And best to build the fire when there in going to be little wind to avoid sharp temperature changes that may crack the chert. Let the coals burn themselves out, may take a day or two. Then dig the heat treated chert up. The best color may happen at a certain depth, usually 3 inches depending on heat of fire and soil type.. This is my junker welding rod oven that will go to 625F for cooking coastal plain chert and coral. Some people use turkey basters with the insulation removed. knaveAbout the same as(silicified) Savannah River chert. Silicified coral heads from Valdosta. The reds, oranges and yellows were heated. Hammer broken and ready to tumble. Different colors due to different chemicals absorbed.
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Post by joshuamcduffie on Jan 28, 2020 8:26:38 GMT -5
nice buckets of color! jamesp. So I had an issue with the barrel slipping and not turning properly, but a good cleaning of the bearings fixed that, I am going to run all this week and check how things are on Friday before I head out of town for a week. I'll add more 60/90 SiC if I need to, or if things look good, I will go to stage 2 (150/220 SiC) and take it from there. I looked yesterday, and things are definitely getting smoother, but I didn't have time to do more than check a piece and make sure things were progressing. Fingers crossed.
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jamesp
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Member since October 2012
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Post by jamesp on Jan 28, 2020 9:00:00 GMT -5
nice buckets of color! jamesp. So I had an issue with the barrel slipping and not turning properly, but a good cleaning of the bearings fixed that, I am going to run all this week and check how things are on Friday before I head out of town for a week. I'll add more 60/90 SiC if I need to, or if things look good, I will go to stage 2 (150/220 SiC) and take it from there. I looked yesterday, and things are definitely getting smoother, but I didn't have time to do more than check a piece and make sure things were progressing. Fingers crossed. Keep in mind that as the slurry gets thicker the tumbler has to work harder to rotate the barrel(and chance for slippage increases). And a half full barrel takes more power to rotate than a 100% full barrel since a full barrel is balanced(waterwheel effect). Two things to consider if leaving it running unmanaged for a week. Travel safe.
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Post by joshuamcduffie on Jan 28, 2020 10:18:48 GMT -5
Good info about the half full versus full barrel.
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Post by arghvark on Jan 28, 2020 10:34:22 GMT -5
Here are some big boys, too big for me to load in the Avalon. Where there's a will, there's a way. Tow strap, come-along, motorcycle ramp. One person. About 375 lbs.
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Post by joshuamcduffie on Jan 31, 2020 12:10:38 GMT -5
So, here’s what the tumbles look like so far. Not a lot of color, and I’m going to give them another week in 60/90 SiC.
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jamesp
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Post by jamesp on Jan 31, 2020 12:24:01 GMT -5
The coastal plain chert is some hard rock Joshua. It is slow to shape. Quick to polish. Looking great !
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