Rusted chondules?

Corning, CA(Zone 8a)

This rock I found in shasta county, near a creek is reminds me something of this chondrite meteorite.

Thumbnail by leeannconner
Poughkeepsie, NY(Zone 6a)

It seems you're hoping to find a meteorite. None of the photos you posted shows any though. At least from what I can see.

Corning, CA(Zone 8a)

thanks tommyr2006 for your feedback... thats why i am posting here to get feedback for people who know more. i know the odds of finding them are slim but my odd are increased... i think because i am doing the same concept of looking for magnetic meteorites in your house drain.. but instead im looking at a big drain pipe...the creek is like a huge drain and this gives you a better chance? Also a few of these stones are showing magnetism and some even have magnets in them that stick to my refrigerator..and they jumped up from the rock when i ground it up... it looked like chips of aluminum like material that separated from a very broken up crystal matrix that danced and then jumped.. very attracted to the magnet...When i looked closer at these chips from the rock... there were green olivine type small pieces and golden looking small piecs in broken crystal matrix... and then of course the shiney black silver metalic stuff that sticks to my magnet. The unbroken crystals sometimes stick too because they still have that metal in matrix....The powder that sticks to my magnet looked white but when i washed it i realized it looked white from the crystals but the black silver looking stuff is what was magnetic and its not white at all. i think its odd behavior of terrestrial rocks... and ive always been interested in Geology so I am soaking it all up. I learn fast. thanks for your feedback.

This message was edited Sep 26, 2011 6:28 AM

Gladstone, OR

Your rock appears to me to be some type of breccia, possibly with an iron nodule or inclusion. I'm definitely not an expert on the subject; I'm just throwing out some possibilities, trying to brush up on my geology a bit.

breccia: a sedimentary rock composed of angular or sharp broken clasts in a consolidated matrix, differing from conglomerates which have rounded clasts. [definition of "breccia" from various web sources]
QUOTE: "Meteorite impact craters can form breccias as the meteor impacts the Earth and the debris is strewn across the country side or back into the crater."

fault breccia

volcanic breccia

chondrite breccias

chondrite breccia / meteorite
see pic > "Photo of Highly Heterogenious NWA 2785 LL3 Chondrule Field w/ Breccia"

chondrite meteorites:
Type-3 Chondrites

Corning, CA(Zone 8a)

Thanks nrowlett....looks like good info. I will check the links.

Gladstone, OR

One thing that crossed my mind is the apparent lack of a fusion crust on your rock, which would seem to indicate (to me, anyway) that it is not a meteorite ... I would think that a fusion crust would be present on meteorites unless it is no longer present due to weathering, the abrading action of water (such as stones in a stream) or other ... such as a meteorite hitting a glacial formation which blasted off the outer fusion crust ...

meteorite fusion crust

... but I have seen other examples on the web of rocks labeled as meteorites without a fusion crust on the exterior, so I'm wondering about that.

I also found these, which may (or may not) pertain to your rock:

"An achondrite is a stony meteorite that does not contain chondrules ... "

see > 40. Achondrite


see also > Eucrites

Calgary, AB(Zone 3b)

You may want to investigate magnetite, which is a very common mineral that is typically dispersed in fine crystals through igneous and metamorphic rocks (and then makes its way too into sedimentary rocks)...

Corning, CA(Zone 8a)

thanks for the feedback nrowlett.
I did find the rock in a creek bed so if there was a fusion crust i would suspect it to be worn down by now.

Unfortunately this is not a rock I kept, I tossed it back down in a pile that most likely will be covered in water by the time i can get back to it. This represents one of a few in the area, so there are others that I do have access to. I would like to do a test on it by grinding some down and would like to look at it with a scope. I am finding metal and crystals and crystals with magnetic metals in some of my samples. I would not be surprised if this was magnetic because of the appearance of rust and iron.

There is a big huge monster copper mine from back in the day upstream well not exactly connected with our creek but within the way the water flows....and within 20 miles and our creek was used back in the day for moving big huge trees for a mill company back in late 1800 so perhaps some of this was affected by the mill activity, separation of iron from copper deposits? or perhaps the volcano Lassen was hot enough to cause magnetism in the olivine crystals. I hope to learn more.

I will have a look at your links now... thanks again.

Gladstone, OR

RE: your comment " ... magnetism in the olivine crystals ..."

Thanks for that info leeannconner - I was not aware that olivine had magnetic properties!

Olivine Magnetic Properties

How To Identify A Meteorite
QUOTE: "Stony iron meteorites are about half metal, half crystals of green or orange olivine."

Calgary, AB(Zone 3b)

The site you posted, nrowlett, looks very useful:

leeannconner: I expect, bearing in mind I have not seen the samples in hand, that if you apply the guidelines, the samples you have shown will be discounted as meterorites or meterorite-impact-related.

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