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thebravecowboy
climber
The Good Places
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Oct 18, 2016 - 07:43pm PT
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Tetrahydrobenzanthracene, methylbenzonaphtothiophene, dihydrotrimethylphenylindene, trimethyldibenzofuran, mineralized/unmineralized.
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Minerals
Social climber
The Deli
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Oct 18, 2016 - 08:28pm PT
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“Just know that the rock you are climbing is almost always older than Cretaceous. 100 million years old or more.”
What about those who like to climb on that extrusive stuff…??? ; )
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ms55401
Trad climber
minneapolis, mn
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Oct 18, 2016 - 09:14pm PT
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Base, you ever been to Minnesota? Wonder what you'd think of this rock on the banks of Lake Superior:
And yes, there are some STOUT routes here.
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Gnome Ofthe Diabase
climber
Out Of Bed
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Oct 18, 2016 - 10:05pm PT
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What kind of stone ? ^ ^ ^ ^ ^ ^ Diabase ?
The brave cowboy ;
Tetrahydrobenzanthracene, methylbenzonaphtothiophene, dihydrotrimethylphenylindene, trimethyldibenzofuran, mineralized/unmineralized.
.? Fit the copy paste, got no where closer to knowing
Blue shoes.
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kpinwalla2
Social climber
WA
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Oct 19, 2016 - 05:56am PT
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My geological research has allowed me to visit the Himalaya in northern Pakistan (8 times), the Gobi in Mongolia, the Alps in Switzerland, and spend months in the City of Rocks - not complaining.
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Jaybro
Social climber
Wolf City, Wyoming
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Oct 19, 2016 - 07:25am PT
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If it's not Precambrian, it's overburden.
Ha! Sherman, whoever he was, salutes you!
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Lone Quail
Trad climber
Littleton, Colorado
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Oct 19, 2016 - 08:31am PT
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Look into civil engineering companies, specifically ones with geotechnical capabilities. There's a range of firm sizes from 1-person to big international corporations. Depending on the company, the work is mostly local or occasionally some out-of-town assignments, and it is mostly a standard work week. It helps to have a technical background in addition to geology, especially if you want to move up, but it's not necessary.
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clarkolator
climber
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Oct 20, 2016 - 05:20pm PT
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I have never climbed a geologist.
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BASE104
Social climber
An Oil Field
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Oct 21, 2016 - 10:58am PT
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If it's not Precambrian, it's overburden.
That overburden can tell an incredible story. Igneous rocks, or at least the intrusive ones, tell only a chemical tale. Perhaps a little insight into tectonic conditions when they were formed.
Stacks of sedimentary rocks tell amazing stories. The deep sedimentary basins where oil and gas are found presents a record of what the Earth was like at the time of their deposition. You can tease out all sorts of cool stuff, like when was O2 most abundant? When did land plants show up, and what does the palynology say? Depositional environments are well studied, and we see modern processes taking place in the deep past.
If you have a pretty continuous record, without major unconformities, you can tell what the planet was like in the past. Sedimentary rocks carry huge amounts of information.
A lot of the basics are easy for a lay person to understand. The methods employed are definitely more than a lay person can understand.
So you get the story, but you are a little ignorant as to how that story was told...what the evidence is.
Subsurface geology is the most incredible and intuitive branch of geology. The stories told by any particular strata can fill volumes.
Some people think that all you need to know is that water runs downhill, but that is a bad joke.
Here is a link to a lot of petroleum geology based papers that are available to anyone. They can be a little wild compared to the peer reviewed AAPG Bulletin, but they are fun to read. You don't need to pay for these:
http://www.searchanddiscovery.com/
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WyoRockMan
climber
Grizzlyville, WY
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Oct 21, 2016 - 11:08am PT
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I've spent the last 10 years in petroleum, so am well acquainted with the complexity of the "overburden". Always thought it was a pretty funny joke. :)
My heart is in archean meta-sediments and igneous ultra-mafic intrusions.
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AP
Trad climber
Calgary
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Oct 21, 2016 - 12:40pm PT
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BASE :
My father was a petroleum geologist, I am a petrophysicist.
You are right about the stories. I am doing a lot of work on the Montney which is the oldest Triassic formation, starting right at the great Permian Extinction. You see no evidence of life in the lower Montney cores then as you go higher (younger) you start to see very small burrows and the occasional fish scale. The water is still too acidic to preserve shell material so the calcite gets dissolved the precipitated. Then you hit the Doig, an organic rich lower Triassic formation and you observe ammonites and a few bones (pliosaur?) announcing that life is back in full force.
In the 1960's my father used to argue with the other geologists whether a gamma ray kick on the logs in a particular zone could be correlated over a distance of 40 miles
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ontheedgeandscaredtodeath
Social climber
SLO, Ca
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Oct 21, 2016 - 03:05pm PT
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I'm an environmental attorney in NM and work with geologists all the time. Seems super cool to me and I would have done that major if I could do math. In our neck of the woods there are a lot of jobs with after work cragging in striking distance and southern colorado is an easy weekend trip.
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BASE104
Social climber
An Oil Field
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Oct 22, 2016 - 12:55pm PT
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Nice to know that there are some hot geologists on here. Why don't you guys speak up when the Christians hammer me about the age of the Earth?
In the eyes of non-geologists, they only see the "ground" that we walk on. They don't know the fantastic landscapes and assemblages of life that grew or crawled or walked. All in DEEP time.
That concept of deep time is something that most people don't understand, much less know the volumes of evidence that the rocks tell us.
There was youtube debate between Bill Nye and a guy from the Answers In Genesis website/group.
He said that since nobody was around in the deep past that the science isn't solid. He made a distinction between modern processes that we can see on Google Earth, against the deep past. The incredible story of geologic history. The guy made it clear that it was highly interpretive and wouldn't accept any evidence of an old Earth or a 6 day creation. He was a smart guy, and mentioned other smart people who believe in the creation story of the Bible.
So speak up and give me a hand. I thought I was all alone here.
As for rock ages, I work post Cambrian rocks. Pretty much all Paleozoic. The midcontinent sedimentary basins were being formed at that time (Carboniferous, which we call Pennsylvanian). There are stacked sequences of eustatic cycles, with carbonates on the shallow shelf in SW Kansas, to clastic deltas close to the hinge line, and deep water deposits in the heart of the basin. The source rock for the midcontinent is mainly from the Devonian Woodford Shale. Only basins that are deep enough produce hydrocarbons. The Forest City and Salina Basins are too shallow, and rarely produce. The Woodford wasn't buried deep enough for it to thermally mature.
Most of the production is from Ordovician through Permain rocks. I've worked these cycles for my entire life, and the structural history is fixed in my brain. 30+ years of working an area will do that to you. I know the history better than I know human history.
It is cool to be able to understand what the rocks can tell you.
As for working super old rocks, I've got some Volcanic Ash deposits that I've found. They are either outcropping Paleozoic deposits or Cenozoic lake deposits, lying on the older rocks.
What is the best way to date ash? A paper was done of 30 deposits in Kansas, and the guy who wrote it used chemical fingerprinting to associate the deposits with various eruptions in the recent past, like the Yellowstone Caldera, the Jemez Caldera, and the Long Valley Caldera. The deposits were "recent."
I've been looking at a lot of coal samples in the paleobotany collection that I am dating. Some clay partings are actually tephra that has decomposed into clay minerals. The way to know is to look for glass shards in the clay, and hope upon hope that you can find Zircons. These samples are usually coal balls. Not a core or trench of the entire coal bed (most of them are only a few feet to a few inches thick).
So have any of you dated ash deposits? I've got a paper to write, but I'm not a hard rock geologist. I'm a sedimentary geologist.
I'm going to visit the coal outcrops in NE OK and SE KS and examine clay partings as well. All of these Pennsylvanian sequences don't have an absolute age. Not like you can get from super old Granitic Terranes, where you can see the assembling of present day cratons. You guys have lots of Zircons to play with. In seds, Zircons are detrital, and in no way can they be used to date an old sandstone. Ash deposits are different, of course. They can give you an absolute date. If I can find these clues, it would be exciting.
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AP
Trad climber
Calgary
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Oct 22, 2016 - 04:44pm PT
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Have you done a Book CLiffs geology trip BASE?
I spent 5 days there and it was awesome.
Especially when we went to a cliff and there were 3 fossilized toes sticking out of the rock (late Cretaceous time). Probably Raptor sized.
The nearby coal mines see lots of dinosaur tracks down in the mine
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Michael Hjorth
Trad climber
Copenhagen, Denmark
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Oct 24, 2016 - 12:55pm PT
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I had the good fortune to work a few seasons in Greenland as a climbing geologist, sampling for gold in steep walls in South and North East Greenland.
In NE Greenland we found absolutely zero gold, but the project in South Greenland (in 1993) later opened as the Nalunaq Gold Mine (now closed).
One thing the work taught me then was, that while risk sometimes can be acceptable when you climb for your own pleasure, it can never be acceptable when you climb for money. At one point we saw a possible gold bearing quartz vein some 50 feet above our fixed rope. The rock was reasonably good, so my partner and I just soloed up some 5.5-ish slabs, and took the sample. Down climbing above a 600' steep face, I suddenly realized the stupidity: To the chief geologist down in camp, it was just another rock sample, risk or no risk...!
Michael
Fixing ropes with Kirkespiret (Church Spire) in the background. Climbing area of Tasermiut is the next fjord south:
Sampling for gold:
Heli pickup each day after work:
Visible gold:
Trundling:
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Nick Danger
Ice climber
Arvada, CO
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Oct 24, 2016 - 02:35pm PT
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I'm not sure I can help you with your career as a geologist, as I am in the twilight years of my own career. However, I might suggest that you keep a pair of shoes and a chock bag in your field vehicle at all times, as you just never know.....
I was mapping on the Nevada Test Site, a highly restricted location that you cannot get to unless you have sanctioned work to do there. There were a couple of interesting outcrops that my field partner and I would spend about 20 minutes working at the end of our field day, and we put up a number of 15 - 20 ft problems ranging from 5.8 to 5.10. They will probably never be repeated because of access issues, but what a wonderful way to finish off the day.
cheers, and good luck with your career
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Nick Danger
Ice climber
Arvada, CO
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Oct 24, 2016 - 02:53pm PT
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BASE104,
I feel your pain regarding arguing with creationists about the age of the Earth. I always feel like I am trying to pour tea into a cup that is already full, and just don't see the point in going forward with the argument. That being said, just thinking in terms of Deep Time adds so much dimension to the observable Universe that my general sense of awe is just shifted into hyperdrive. I feel like those folks are trying to put limits on the Infinite and I just don't understand their motivation for doing that. Do they actually feel like the Creator of All-That-Is is as limited as their own feeble perspective????
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BASE104
Social climber
An Oil Field
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Oct 24, 2016 - 06:00pm PT
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Nick, I'm not out to turn religious people into atheists. I'm not a Richard Dawkins. That said, when I see outright lies, and rather simple minded ones, it gets my hackles up.
Great photos and stories above. Hard rock mining is a totally different sphere of study. Geology is a big topic.
Right now, I'm looking at ash beds and clay partings in coals to see if they have a volcanic origin, and if so, any zircons can be used to date the rocks.
It is difficult to date sedimentary rocks directly. A lot of ash beds decompose into Smectite-Kaolinite clay layers, and I'm hoping that I can find unaltered glass shards in the paleozoic coals east of the Rockies. Ash partings are common in Cretaceous and Tertiary coals in the west, but any ash deposit in the much older carboniferous coals is likely to have been totally decomposed. The only way to determine volcanic origin is via exotic REE chemistry and unaltered glass shards. If the glass shards have decomposed, it will be tough, but silica holds up well to diagenesis.
A lot of work has been done in Eurasia on ash in Carboniferous coals there. It hasn't seen nearly the same attention here.
I live fairly close to the subcrops of the common late Carboniferous coals in SE Kansas and NE Oklahoma and SE Oklahoma. I'm going to be going on a lot of field trips this fall to take samples and shallow cores.
Dating mainly comes from biostratigraphy, which is good, but not precise. I am going to look at thin clay partings in the coals. In rocks that are that old, the ashes will have totally decomposed, and missed.
I've seen ash deposits at great depth on well logs, but for the life of me, I can't recall which ones. I look at thousands of logs each year, and I tend to concentrate on zones that are prospective. That said, I've seen ash signatures. One thick one, that I wish I could recall, now that I know what to look for: high gamma ray count and high resistivity where it doesn't belong.
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Grippa
Trad climber
Salt Lake City, UT
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Oct 24, 2016 - 06:43pm PT
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I'm graduating from the University of Utah with my BS in Environmental Geology this spring. Congrats on finishing up dude you've worked hard! Look into taking your ASBOG FG (Fundamentals of Geology) exam after you've finished your geo classes. It is an nice accreditation for working as a consultant, and sometimes required. 4-5 years after entering the work force you'll take the ASBOG PG (Practices of Geology) to officially receive your professional geologist certification.
I just took the FG, and overall it is just as advertised "fundamental". Expect everything from 3 point problems, professional work questions, hard/soft rock, and gamma ray log questions. If you decide to work for the government then these are not required, but could boost your resume. Good luck hombre!
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Tricouni
Mountain climber
Vancouver
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Oct 24, 2016 - 07:37pm PT
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I spent umpteen years with the Geological Survey of Canada, mainly working in the Coast Mountains. I could not imagine a better, more satisfying job. Unlike Base, I work mainly in granitic and high-grade metamorphic rocks ("improved rocks", in the words of one of my old profs.
I don't get involved in the creationism arguments, because it's pointless. I'm never going to change their minds, and the same old arguments just go round and round. Same with age-of-the earth arguments. Like Nick D, I think science, far from diminishing our view of the world, greatly enhances it. Like Nick, I am in awe of how big the universe is, how old it is, and how varied and wonderful life is. But I don't believe in god and I never have. There's no need to invoke god to explain everything, even though we cannot yet (maybe never) explain all.
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