Arizona outcrop ID help please

[ShadowsAz]

While cutting across an area in Arizona, (on my way to prospect for gold) I found this
outcrop. I have never come across anything like it, and wondered if anyone could help with
an ID or even with where I might research something like it. I have enclosed three photos
of the "sort of egg or round shapes" as well as three photos of the "vein". These are both
in the same outcrop. Thanks for looking!

 

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[Pirate Dirty Jack Rackham]

I cant tell you anything about what you found but I can tell you that Arizona has some of the most interesting and unique geology in the southwest, hell probably the whole U.S.!

 

[ShadowsAz]

" Unique geology " fantastic views, interesting people, and Gold, silver, copper, gemstones!
I could do commercials for the Travel Channel .... LOL .... I did however have someone suggest
that the outcrop looked like "nodules in rhyolite" (SP ?) and that I might look into some research
on Opal. So that is my new field of study, as I begin, all I know is Opal is my wife's birthstone...
I obviously have a long way to go.......

 

[Weddle546]

Im new to the site and i am an Arizona rock hound, The vein could possibly be tigers eye? hard to tell from the picture, but if not is probably an agate. the nodules happen quite often, they are deposits that boiled up thru ancient mud i believe. They are probably quartz and look pretty cool if you cut and polish them. Keep a lookout for those blues! (im a gem silica nut). Really cool out cropping you found there. looks like the area may be rich in minerals.

 

[Weddle546]

OH YEAH! so you have the blue fever too? lol. i grew up with my uncle always hunting it. Always some story somewhere leading us to an old mine. He usually has atleast 10 pounds of the best grade laying around.

 

[mrs.oroblanco]

Cannot really tell from your pictures (sorry), but, maybe thunder eggs.

Do any look like these?

 

[DanB]

Looks like some basalt and chalcedony.....(Chalcedony has a waxy luster, and may be semi-transparent or translucent. It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black.) Hope this helps......Agate is associated with these rocks.

hope this helps

db

 

[mrs.oroblanco]

There is definitely chalcedony in the pictures.

 

[Arid-Zone-A-seeker]

That is Gas pocket agate, very common, usually found after they have eroded from the lava.Crack some or cut some open they should have lines like a topo map, called fortification. They will probably fluoresce light green, lime green.

 

[extractor]

Im new to the site and i am an Arizona rock hound, The vein could possibly be tigers eye? hard to tell from the picture, but if not is probably an agate. the nodules happen quite often, they are deposits that boiled up thru ancient mud i believe. They are probably quartz and look pretty cool if you cut and polish them. Keep a lookout for those blues! (im a gem silica nut). Really cool out cropping you found there. looks like the area may be rich in minerals.

Agree

 

[DanB]

most of the nodules I cut open when hit with a special black light makes them light up orange in the banding, or in the hollow center...

db

 

[Eu_citzen]

Conglomerate maybe? A ancient river channel there?

 

[Arid-Zone-A-seeker]

Are you using Long wave, short wave, or mid wave, Calcite center maybe if they are hollow.

 

[mrs.oroblanco]

Volcanic action - and Chalcedony.

B