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Post by mohs on Mar 23, 2022 21:28:53 GMT -5
Yohs ! As to that barrel I was doing some research And they are prone to topple. Some are called compass cactus they have tendency to lean towards the  southwest...mostly they reach a critical mass and fall Like a rock barrel that over full & blows its top perhaps So that probably accounts for the above It makes me feel bad Butte ya knows life cycle Its irrepressible Thorns on this cacti are really really sharp Especially the cholla Those needles are of unbelievable strength, and the keenest point They poke & attach deeply into leather with the lightest brush; & they don’t let go Its really incredible The other thorn that amazes me is on acacia trees or a particular type of mesquite Those thorns grow well over an inch long on the limbs Strong and sturdy. Mostly to prevent birds from randomly landing And snatching seed pods Is one of my guesses  |
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Post by mohs on Mar 23, 2022 21:30:58 GMT -5
being it hump day  wish all pleasant evening  |
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Post by Pat on Mar 24, 2022 0:02:58 GMT -5
Ed, I always wonder which came first, too. Nevertheless, it is an intriguing specimen.
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Post by mohs on Mar 29, 2022 10:54:57 GMT -5
somewhere ov'r the butte 
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Post by mohs on Mar 30, 2022 14:36:44 GMT -5
just a few more steps  to the above & i'll be home  Just happened to stumble upon this unique tree/ shrub On my shadow chasing quest  From a quick cursory search I think its mescal bean of the laurel family  Thanks ED |
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Post by mohs on Apr 7, 2022 15:29:56 GMT -5
This is the backside of bladder damn That hold back Tempe Town Lake  It did cross my mind If the bladder breaks Mohs will have no place to stay Morhz acutely I’ll be buried in the Salt How very appropriate Then a couple daze ago I enter the Salt basin From a distance upstream And saw this sign  Damn! Now you tell me….m  stly |
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Post by mohs on Apr 20, 2022 15:11:51 GMT -5
headed that way  keep on mohs |
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Post by mohs on Apr 22, 2022 19:17:21 GMT -5
Well this really rocks I had sent the picture of the green seam Salt River granite chunk to a very geologically informed person, and just received a lengthy informative email reply I’m not going to name this person I told him I’m member of RTH & that he should check out the forum So if he chooses to make his presence known I’ll allow that at his discretion Butte perhaps he’ll read this and know how appreciative I am--- that he took the time to email me informative information . Just a little clip of this e-mail and the rock of note  |
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Post by Son Of Beach on Apr 22, 2022 19:30:42 GMT -5
"Both can form as alteration products of the biotite and hornblende found in the granites" I get lost right here. "hydrothermal fluid flow" I don't 100% know what this entails but I think I get it. I honestly feel like the green is a sort of improvised biothermalgeoligical happening, if that makes sense lol
I think epidote, and unakite in a sense, is life crystalized.
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Post by hummingbirdstones on Apr 22, 2022 20:24:11 GMT -5
That is so cool, mohs! Even I could understand that explanation. Mohstly.  |
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Post by mohs on Apr 22, 2022 20:31:06 GMT -5
right on ! I’m not adverse to that seam being bio in nature Although I did do that scrtch test That seam –seems- to be pretty mineralogically crystallized Although who knows ? There are Tales of certain bio- organisms That eat rock minerals Now this may start to descend into my yeast eating theory of how the spo-dee-odi bays formed Inductive reasoning indeed Big smile I think the bays were formed by ancient giants. Ah yes! They were pressing and mixing humongous batches of vino in the earth The bays were created by the giants composting their fields Cultivars of Saccharomyces cerevisiae. Vital for the frothing of a fine red sparkling wine. May I suggest a Lambrusco ? This is also explains why there are abundant amounts of ethanol in the universe! Fumes rises…. no? Were always hearing how some meteor delivered h this mineral or that element to earth . Always something coming from the outside bah Well let Mohs set the record straight. Earth has made it own contribution to the universe! We got the universe drunk. This explains many events,,, m  stly |
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Post by RickB on Apr 23, 2022 5:51:29 GMT -5
mohs, my vote is for Epidote or chlorite as being the green vein that's cutting through that piece of granite. Don't have any photos to show you but I have seen granites in North and South Carolina that look like your photo composed of quartz, pink feldspar, biotite mica and hornblende with a green band cutting through it. Sometimes I'm able to see tiny green crystals in that band and other times no crystals can be seen. If I see crystals I figure that it is epidote and when I don't, I usually assume that it could possibly be chlorite. When there were very tiny crystals, the green was darker in color. My layman guesses as I've only had a couple geology courses many years ago and this subject was never brought up in either class. RickB " Epidote is a silicate mineral that is typically observed in domestically metamorphosed rocks of low-to-slight grade. In those rocks, epidote is often associated with amphiboles, feldspars, quartz, and chlorite. It occurs as replacements of mineral grains which have been altered by using metamorphism. It is frequently found in veins that cut granite. It takes place as monoclinic crystals in pegmatites. It is likewise discovered in huge form and as monoclinic crystals in marbles and schists that were fashioned or altered thru contact metamorphism." geologyscience.com/minerals/epidote/
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Post by mohs on Apr 24, 2022 18:21:28 GMT -5
Interesting RickB The whole is issue of mineral cutting across the crystals of the granite is a new phenomenon to mohs What caught my eye about this granite was the clear wide -well defined- parallel line Chad Son Of Beach posted a link That showed a Michigan Beach Gabbro With what appears to be Quartz owlcation.com/stem/Lake-Michigan-Beach-StonesActually I see a lot of stones with quartz seams Butte granite ? not so often Or maybe ,ohs is taking things for granite? ha Now I wonder if- in mt granite sample if that indicates a demarcation zone? Like an earlier granite formed then a hydrothermal event laid down a layer of sedimentation crystals over that edge ? Later another contact zone of granite occurred trapping the seam ? Nah! Most likely from a hydrothermal sedimentation event taking advantage of a micro fine cracks in the original granite not sure if any of this may make sense ? butte hey I’m nursing a over hang....mostly I’m really over the ledge now  I’m thinking that granite represent a fault zone ? Maybe the granite cracked, and shifted horizontally from some earthquake ? Then a hydrothermal sedimentation took place? I’ll have to contemplate this on Salt River rolling waves  |
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Post by RickB on Apr 24, 2022 19:38:21 GMT -5
 I think you're onto something. |
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Post by mohs on Apr 24, 2022 20:05:14 GMT -5
Ur right Rick Mohs is definitely on something  |
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Post by mohs on Apr 26, 2022 11:19:13 GMT -5
A fellow came by yesterday with some very small rock samples He wanted to know if they were pyrite or some other metal ? Such as platinum ectal... I started to get into a discussion with him He claimed these rocks were magnetic I replied, maybe to quickly, that the best I knew pyrite was not magnetic Then we started to get into a pretty intense conversation This fellow was way informed going beyond my comprehension. Butte I did take a rock out side to the sunlight to explore it. Just quick photo- SOP-- when these people bring rocks to me  Anyway best I can tell it pyrite crystals in a matrix. Butte the bigger question is: Is natural pyrite magnetic? A tricky question probably... Thanks ED |
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Post by RickB on Apr 26, 2022 15:42:37 GMT -5
Iron pyrite can stick to a magnet because of its high iron content;
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Post by mohs on Apr 26, 2022 15:48:56 GMT -5
Right on Rick
I haven't done a thorough test, yet
Butte preliminary results were negatory
Have you tried?
Results...?
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Post by RickB on Apr 26, 2022 16:43:17 GMT -5
Ed, I have strong magnets that I took out of a microwave that have mild attraction to pyrite. It's attracted to the pyrite but they don't stick together. I also
have a cheap metal detector that will detect some iron pyrite crystals in the ground/matrix. Friends with more expensive detectors usually can't detect them.
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Post by mohs on Apr 26, 2022 17:34:14 GMT -5
Thanks Rick ! Appreciate the info RickB figured my preliminary test is flawed used only tiny grains of pyre so maybe not enough iron content? I also have a peanut size pure of piece of pyrite Tried with it neodymium magnet --no go not 100% certain it pyrite tho  To set up a hypothesis Everything needs to be need to be just right & there are an infinity of ways to be wrong Hence the Murphy syndrome Anyone with a display cube of Pyre  Give it a try? |
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