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Post by 1dave on Feb 22, 2014 12:07:11 GMT -5
How about a new forum on Geology?
When we know what is found where and how to read geology maps, finding new stuff becomes an adventure.
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timloco
has rocks in the head
Member since April 2012
Posts: 545
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Geology
Feb 23, 2014 9:44:47 GMT -5
Post by timloco on Feb 23, 2014 9:44:47 GMT -5
I would love to learn more about geology in general.I bought the textbook to go with the MIT opencourseware Geology 101 and it was a good start. But my rockhounding would improve greatly if I knew more.
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Geology
Feb 23, 2014 12:16:36 GMT -5
Post by 1dave on Feb 23, 2014 12:16:36 GMT -5
Paid geologists are in many "straight jackets." Petroleum geologists that specialize in conodont teeth, vulcanologists, etc.
I'm thinking of something geared more at rockhounds.
For instance, there are four different kinds of "geodes."
Geology maps will often say something like "Rhyolite with spherules or "Lithophasae" up to 8" diameter."
Those are Thundereggs!
Or "Basalt (or Andesite) with vesicles or gas pockets or Amygdaloids." That is where gas bubbles were trapped and later filled with agate and crystals - the Brazilian type geodes.
Or "Devonian lake bottom deposits." That is where you find the "sedimentary geodes" like Dryheads, Lake superior agates, Keokuck geodes, etcetera.
And then there is the kind where agate filled hollows left by earthquakes, landslides, or minerals being dissolved.
For Petrified Wood in Nevada (California didn't exist yet) to Texas, the largest selection is found in the Petrified Forest portion of the Chinle.
Dinosaur Bone is common in the Morrison Formation.
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timloco
has rocks in the head
Member since April 2012
Posts: 545
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Geology
Feb 24, 2014 9:41:58 GMT -5
Post by timloco on Feb 24, 2014 9:41:58 GMT -5
Yea, that's the kind of stuff I'd really like to know, practical things like that. Not that just whipping out the geo map and charging through the brush isn't fun :-)
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Geology
Feb 24, 2014 11:46:43 GMT -5
Post by 1dave on Feb 24, 2014 11:46:43 GMT -5
I just checked out what is available:  And areas being mapped right now:  |
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timloco
has rocks in the head
Member since April 2012
Posts: 545
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Geology
Feb 24, 2014 16:34:55 GMT -5
Post by timloco on Feb 24, 2014 16:34:55 GMT -5
oh yeah, I've lost hours and hours on that database. Northern CO isn't too well represented unfortunately. A lot of the stuff is still on hand colored maps just scanned in.
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herchenx
Cave Dweller 
Member since January 2012
Posts: 3,360
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Post by herchenx on Feb 24, 2014 16:45:17 GMT -5
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Post by 1dave on Feb 24, 2014 22:44:10 GMT -5
Interesting that the eastern states with the most population have the least information.
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herchenx
Cave Dweller
Member since January 2012
Posts: 3,360
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Post by herchenx on Feb 24, 2014 23:02:40 GMT -5
Interesting that the eastern states with the most population have the least information. Everything is either private, buried under a city or in deep woods I would suspect. .. Love the west. |
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lparker
fully equipped rock polisher
Still doing too much for being retired!
Member since March 2008
Posts: 1,202
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Post by lparker on Feb 25, 2014 8:12:50 GMT -5
Naw, we got the information...just ain't sharing it  |
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Post by rockpickerforever on Feb 25, 2014 10:35:41 GMT -5
I think Lee hit the nail on the head... Well, that, and it seems everything keeps being designated as "wilderness" areas, at least here in Commiefornia. So if you see a possible hounding spot you'd like to check out, best to find out if you are still allowed to collect, or even go there.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,722 
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Post by Fossilman on Feb 26, 2014 11:25:42 GMT -5
Way back,my Uncles taught me some geology,before they would take me fossil hunting.I was taught the land layouts,the different zones for different fossils..Cool stuff after a guy got the hang of it...
In Montana,I always seen one or two geologist roaming around the country side looking for minerals,rocks and (or) fossils....
Montana and North Dakota being oil country,there were tons of geologist running around...
They gave me a few pointers too........Yes lets have a spot for geology..............Thumbs up
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Post by nowyo on Feb 28, 2014 2:27:43 GMT -5
Yup, I vote for a geology forum. I know a little and can always learn more. One of the things i love to do is look at the maps and say, "Hmmm, they're finding x over here, and the same type of thing is going on over there, let's check that out". Sometimes it works, sometimes it doesn't. Learning new stuff is always good, and it would help us all become better rockhounds and understand why we're finding what we're finding where we're finding it.
Russ
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Geology
Mar 2, 2014 12:18:56 GMT -5
Post by gingerkid on Mar 2, 2014 12:18:56 GMT -5
Thanks for creating a forum on geology subjects, Dave! Have enjoyed reading your threads. |
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