Rock Climbers naturally love to collect Rocks

Search
Go

Discussion Topic

Return to Forum List
Post a Reply
Messages 241 - 260 of total 260 in this topic << First  |  < Previous  |  Show All  |  Next >  |  Last >>
Klimmer

Mountain climber
San Diego
Mar 9, 2013 - 01:32am PT
Give me a hint.

Stony?

Stony-Iron?

Iron?
Ron Anderson

Trad climber
Soon to be Nipple suckling Liberal
Mar 9, 2013 - 01:42am PT
option B Klim.
BASE104

Social climber
An Oil Field
Mar 9, 2013 - 01:54am PT
The coolest rocks aren't the pretty crystals, which are only one mineral.

Take some granite. Go to a lot of trouble to extract the zircons. Do some more washing with harsh acids.

Then you can date a rock several billion years old with amazing precision.

Every rock tells a story, which is why I love geology. When you put them all into the proper relationship with each other, you can see the history of the planet.

I don't think that there was a single gemstone class offered when I was in school, and there still isn't. The cool rocks may be as simple as the Wingate at Indian Creek.

Crystals have fluid inclusions, and you can hit them with the electron microprobe and tell the chemistry of the parent melt.

Hell, ice is a mineral, and obsidian, strangely, doesn't fit the definition. We don't really care, because obsidian implys super fast cooling of a basaltic magma.

Hopefully I didn't get any of the igneous rock stuff wrong. I work entirely with sedimentary rocks, and I think that they are far more fascinating.

I turned down a choice job offer at graduation with the USGS because it was mapping volcanics in Nevada. Boring.
Klimmer

Mountain climber
San Diego
Mar 9, 2013 - 01:57am PT
I would just like to say that it's very hard to identify a meteorite from a picture. Scientifically it's impossible, since it has to be validated geochemically, etc. etc. etc.

Having said that, I zoomed in on the image and its pretty grainy. Unless you give me a clear image of each specimen up close, I don't have a chance.


A stony-Iron is like a Pallisite:

Mostly metal with some minerals.




Marvin Killgore holding up a massive slice of his famous Chinese Pallisite meteorite that he purchased from a Chinese nomad for very little. Not good karma.





Ron Anderson

Trad climber
Soon to be Nipple suckling Liberal
Mar 9, 2013 - 01:57am PT
Base,,,Alvin McLane didnt think that was boring..;-)
T H

Boulder climber
bouldering
Mar 9, 2013 - 02:38am PT
volcanics in Nevada. Boring.
Michelle

Social climber
Toshi's Station, picking up power converters.
Mar 9, 2013 - 03:32am PT
Plaid, those are really pretty!

All of these collections are wonderful! Thanks for sharing.

I like to collect moonstone at the beach and totally need to go back to Glass Beach in Fort Bragg.

Sierra Ledge Rat

Mountain climber
Old and Broken Down in Appalachia
Mar 9, 2013 - 10:14am PT
Someone who likes rocks more than climbers: Rock eater!

Credit: Sierra Ledge Rat

Watch the segment 15:00 through 17:00 (actually starts at 15:10 but the part at 15:00 is worth watching...)


Dr. F.

Big Wall climber
SoCal
Topic Author's Reply - Mar 9, 2013 - 11:46am PT
The coolest rocks aren't the pretty crystals, which are only one mineral.
Base
I disagree, these are treasures from the earth
They have a incredible story to tell.

I used to just look at the pictures in books, now I have my own collection of them, it's an adventure in the long lost past of earth's early history, mining, world markets, wheeling and dealing, and going to places to find your own

My photography needs work
Credit: Dr. F.
Aquamarine and Heliodor

I hope to scan some Rock Porn in soon, and you will agree that World Class minerals are truly incredible
can't say

Social climber
Pasadena CA
Mar 9, 2013 - 12:19pm PT
This is a different kind of collection. Samples collected from the various climbing area's visited. This is about 1/4 of the collection.
Credit: can't say
Credit: can't say
not mine of course
mouse from merced

Trad climber
The finger of fate, my friends, is fickle.
Mar 9, 2013 - 12:31pm PT
Trophies.

Hey, Ron, howya at stuffing Rocks?
Ron Anderson

Trad climber
Soon to be Nipple suckling Liberal
Mar 9, 2013 - 12:36pm PT
Quite good actually Ol Merced Mustelid..

Ill be making some African Volcanic mud today...
Michelle

Social climber
Toshi's Station, picking up power converters.
Mar 9, 2013 - 01:35pm PT
Dr F, you got any Moldavite?
Plaidman

Trad climber
South Slope of Mt. Tabor, Portland, Oregon, USA
Mar 9, 2013 - 01:41pm PT
I opened an Esty store so I could sell these gems.
Here is the web address:http://www.etsy.com/shop/TheRealPlaidman

This is one I made for my daughter. She didn't want it polished. It is agate with the small shell florish.
Credit: Plaidman

Plaid
BASE104

Social climber
An Oil Field
Mar 9, 2013 - 01:57pm PT
Dr.:

In a practical sense, pretty gemstones aren't involved in geology other than their economic value.

An igneous rock is filled with crystals or each constituent mineral. From that mix of minerals, you can tell sooooo much. Pretty crystals are nice, but have you ever worked with thin sections or a SEM?

That is where the work is. Just ask Minerals.

Pallisite meteorites are way cool. The green crystals in it are Peridot, which is the gemstone name for crystalline Olivine.

On Earth, Olivene is found in very deep mafic magmas. The fact that they are encased in a lattice of extremely large crystalline nickle and iron means that they are probably part of the core of a relatively large body that got smashed to sh#t.

You can buy almost any mineral on Ebay. I believe that moldavites are sand that has been fused into glass from impacts. Many come from north africa off the top of my head. Now that rock tells a story, just as shocked quartz tells a story.

As a general rule, you get big crystals because as the melt or conditions for crystal growth, were steady at that point in time, giving time for the crystals to grow large. Pegmatites are an example of this. If a rock cools quickly, the crystals of each constituent mineral is typically small.

This is where I would hand off to minerals and he would explain the plagioclase feldspar megacrysts in Tuolomne..meaning the big knobs.
kpinwalla2

Social climber
WA
Mar 10, 2013 - 12:56am PT
because obsidian implys super fast cooling of a basaltic magma.

actually most obsidian results from fast, but not necessarily super fast, cooling of a rhyolitic lava (not magma) that has a low H20 content. It is a common misconception that because obsidian is black, it must be chemically related to basalt.
Ward Trotter

Trad climber
Mar 10, 2013 - 01:19am PT
http://m.youtube.com/#/watch?v=hRvWC5NddXQ&desktop_uri=%2Fwatch%3Fv%3DhRvWC5NddXQ
AlexC

climber
Bay Area, CA
Mar 10, 2013 - 03:34am PT
Agates anyone?

Three from eastern Arizona:

Credit: AlexC
Credit: AlexC
Credit: AlexC
Dr. F.

Big Wall climber
SoCal
Topic Author's Reply - Mar 10, 2013 - 10:45pm PT
I just sold 16 lbs of Peridot
I know all about Peridot, want some?
Plaidman

Trad climber
South Slope of Mt. Tabor, Portland, Oregon, USA
Mar 11, 2013 - 10:02am PT
Newest addition. Figure 8 tie in on jasper. I got a drill press.....
Credit: Plaidman

Credit: Plaidman

Credit: Plaidman
Messages 241 - 260 of total 260 in this topic << First  |  < Previous  |  Show All  |  Next >  |  Last >>
Return to Forum List
Post a Reply
 
Our Guidebooks
Check 'em out!
SuperTopo Guidebooks


Try a free sample topo!

 
SuperTopo on the Web

Review Categories
Recent Trip Report and Articles
Recent Route Beta
Recent Gear Reviews