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Post by Son Of Beach on Nov 11, 2022 14:52:22 GMT -5
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vance71975
freely admits to licking rocks
Member since September 2022
Posts: 760
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Post by vance71975 on Nov 11, 2022 19:16:51 GMT -5
One of my fav finds is a piece of Green amygdaloidal Tholeiitic basalt according to the geologist I contacted, it almost looks like jade, tho it wont be amygdaloidal when I finally get around to finishing tumbling it lol
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Post by mohs on Nov 12, 2022 16:12:51 GMT -5
i wonder what obsidian morph into when it does't cool fast enough? because I got this chunk of gray rock and I think it volcanic  sheen seems like obsidian like cooled just tad slmoher to be completely glassy |
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Basalt
Nov 12, 2022 18:39:25 GMT -5
Post by Son Of Beach on Nov 12, 2022 18:39:25 GMT -5
mohs I think your piece looks like the aphanitic basalt he mentioned. It's all over the beach comes in all slightly different flavors, some more shiny or textured than others. 
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Basalt
Nov 12, 2022 19:21:44 GMT -5
Post by mohs on Nov 12, 2022 19:21:44 GMT -5
cool chad  I'll have to look at the blues stones more closely that I see in the Salt |
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Basalt
Nov 12, 2022 19:35:32 GMT -5
Post by mohs on Nov 12, 2022 19:35:32 GMT -5
awhile back I mentioned about inspecting Haydon Mill Andesite rubble  and the anomaly of the different geologicalhttps://res.cloudinary.com/rock-n-hearts-inc/image/upload/v1664723442/NEWER/andesoteexcavated.jpg forces on north nad south side of the Salt River the Phoenix basin as a deep volcanic fill in I think |
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Basalt
Nov 12, 2022 19:38:21 GMT -5
Post by Son Of Beach on Nov 12, 2022 19:38:21 GMT -5
cool chad  I'll have to look at the blues stones more closely that I see in the Salt Ehh the orange towel kind of messed up the color, they are much closer in color to the one you posted, some have that midnight blue tint though... |
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Basalt
Nov 12, 2022 19:51:54 GMT -5
Post by mohs on Nov 12, 2022 19:51:54 GMT -5
the famous bluestone of StoneHenge
wonder if that rock is of volcanic orgin
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jamesp
Cave Dweller 
Member since October 2012
Posts: 36,618
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Post by jamesp on Nov 15, 2022 9:49:31 GMT -5
I was told the blackish/grey basalt surrounding the large ancient volcanic shaft at the Woodward Ranch was 800 feet thick and loaded with those beautiful agate filled amygdules ranging from 1" to 20" in size the whole way down. Only the ones at the surface are laying around loose because of slow erosion of the basalt. Those nodules are famous for their tree like plumes contained in translucent chalcedonies. The big nodules were all picked early by the first lucky collectors. Time to wait for more slowly advancing erosion of the basalt before more will be exposed. Maybe some of the basalts in your area have such agate nodules in them Son Of Beach. These large ones a hard to find any more. They had/have a display of larger early find nodules. Famous for the black plumes but they also have most colors of plumes. Must depend on the chemicals leached in from the basalt ?  |
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