Flinders Ranges - my kind of place!

They are from a semi-secret location near Pichi Richi Pass (known to generations of Adelaide uni students as Itchy Itchy A...).

This is a site of world significance, a geological monument, and the people who have worked on it don't want it vandalised. As it is some people came over from the US, located it and sampled it for palaeomagnetic work, without permission. Much like they did for the type boundary of the Ediacaran

The outcrop (and correlates near Adelaide and elsewhere) has been extensively studied by George Williams.

Just for you, a couple more pictures of the Flinders - Wilpena Pound, Brachina Gorge, and the ABC range

Jon

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Thank you, Jon ... the second one reminds me that I have to dig out and re-scan my photos of the field trips - I have some close-ups of the Rawnsley Quartzite showing the spectacular dewatering structures, and some reasonable quality Dickensonia fossils; I think I have one or two of the earlier rippled seafloor (before it was almost all removed); and one of a Pantapinna Sandstone cobble that would give a rhythmite-counter a real headache ...

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I think the Flinders ranges are one of the best places in the world to tach sedimentary geology. Almost perfect, 3D exposures, little weathering, and kilometres of section coverig almost every sedimentary environment imaginable.

I can't resist these. Left to right:

Sturtian tillite, Arkaroola
Stromatolitic limestone Arkaroola
Mudcracks,BC quartzite, Pitchi Richi
Stromatoltes, Trezona Lmst, near Brachina
Acraman ejecra horizon, near Bunyeroo Gorge

Jon

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Beautiful pictures Dr. Clarke.

You just have to post this in another thread! (I don't wish to derail this one)

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In your rush to call everyone "entrenched" or closed-minded or "limited" you fail to note that the "limit" here has a very natural boundary: that point at which the evidence stops. - JayUtah

Science fiction was never meant to be an educational tool. - Editor Amazing Tales

you're right on both counts, BigDon ...

if Jon doesn't object, can we ask a mod to shift those three posts to a more suitable locale?
I suspect Jon and I could ramble on about Nature's greatest* gift to geology -
and that would undoubtedly raise some challenges from other spectacular regions ...

*of course I'm biased!

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Oh *I* see, and here I was about to ask you guys if you would like me to take pictures of some of my local geological formations and some of my more interesting pieces, but I see how it is. Like the copralite I found that I dropped by accident and it broke open to reveal unfossilized pine cone parts or the upper humerus of something that weighs 35 pounds. With teeth marks.

But if you aren't interested, fine.

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In your rush to call everyone "entrenched" or closed-minded or "limited" you fail to note that the "limit" here has a very natural boundary: that point at which the evidence stops. - JayUtah

Science fiction was never meant to be an educational tool. - Editor Amazing Tales

Akways interested Don!

Absolutely! definitely interested!

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but not on someone elses thread.

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Here's your thread. I'll entertain better names for it.

My father worked for the USDOT for years. I recall on one vacation trip through Oklahoma, he took us on a section of I40 that had yet to be opened to the public. It cut through the Davis Mountains and exposed some really interesting geological layers. Since there was no traffic, we got to take our time, stop and get out, and really enjoy it.

Probably nothing like Australia (well, lots of red dirt, dry and dusty), but rocks is nice to look at anywhere.

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Never attribute to malice what can be adequately explained by ignorance or stupidity.
Isaac Asimov

Goodness, I'm from Adelaide and I heard that one in primary (elementary) school. Possibly only uni students were willing to travel that far to vandalize the signage. I'd imagine they'd be from Flinders.

Nice photos. Stomatolites are amazing fossils, I think. Your specimens look much like the ones I've seen and collected over here (the US).

Thanks for facilitating the move, Jim -
we didn't really want to hijack the other thread ...
and I didn't want to see these great images lost or locked away in ATM ...

Road cuttings can provide exceptional views into the local geology,
quarries are another great source ... both were frequently used in field trips when I was a student at >ahem< Flinders uni ...

very true ... but such claims are better supported with visual and descriptive evidence* ...

yes, it does look a lot like some of the later Trezona Fm stromatolites (the earlier/lower exposures were much flatter and less interesting) ...
geonuc, do you know how old the pictured specimen is?
or what formation it was part of?
and, where in the US did you find it?

great pic, by the way ...


*I'm still hunting through boxes of field trip photos for mine ...

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All my good shots are too big by a factor of 10 to post and its only a 5 mega pixel camera. I'm working on it. Suggestions?

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(By the way, I hate it that so many papers in the areas of planetary science and geology are not easily available to the dreaded "non-subscribers". It is like they are screaming at me: "YOU CAN'T HANDLE THE TRUTH". Good, I feel better now.)

"Quaerendo inventis"

Ok, probably not enough context, but this was taken in the Wasatch mountains outside of Salt Lake.

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(By the way, I hate it that so many papers in the areas of planetary science and geology are not easily available to the dreaded "non-subscribers". It is like they are screaming at me: "YOU CAN'T HANDLE THE TRUTH". Good, I feel better now.)

"Quaerendo inventis"

Us Flinders graduates are a much higher calibre than those from Adelaide Uni.....

And hurry!

Best uni in SA, and don't let those smog breathers say otherwise! When were you at Flinders?


The Trezona is essentially an upward shallowing succession, with the largest and most complex stroms in the middle to upper parks.

Here is another stromatolite from the same Trezona outcrop, a bedding plane exposure this time.

Jon

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In most image programs you can reduce the size of the image to a set % or width. I use MS photo editor or Picture manager.

Jon

I don't know the geology of the rock precisely - was playing geo-tourist at the time. The photo was taken on the road to the Benbow Mine in Montana, part of the Beartooth Moutntains. The area is renowned mostly for the Stillwater Complex, an Archean layered mafic intrusion that contains useful ores such as chromium. The road guides I have say the intrusion was overlain by Cambrian sedimentary rocks, so I suspect the stromatolites are part of that.

More photos of the area here, if you're interested:

http://www.flickr.com/photos/4992561...7606369324436/

I use IrfanView. It's free and very easy to use.

alternatively, if you have a program that includes a "select" function, you can pick the best piece(s), copy & "save as new image" ...

NB - image file type can also affect file size - eg, .bmp files tend to be much (much!) larger than .jpg files ...

if your files are - .bmp, or .gif, or .png, or .pdd ...
try "save as" .jpg (or .jpeg) and check the size of the new file ...

From '99 to '02, mostly - I was sort of there in '03, but rarely on campus -
after that, it was a trip West, and Curtin Uni for a couple of years ...


ps - I found some of the images I'm looking for ... post soon ...

geonuc - yes, some interesting pics there ... you might well be right about (20) and (21) being fossiliferous ...
and Cambrian doesn't seem unreasonable for a stromatolite ...
the one in your set seems to be overturned - that can happen - which means the underlying strata should be younger ...

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Yes, there's a lot of folding and faulting in evidence in that area. You might have noticed the vertical limestone 'palisades' sticking up out of the hills like a giant stone stegosaurus.

Might I say "Assembling California".

My all too brief examination of the Wasatch was example after example of the same.

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(By the way, I hate it that so many papers in the areas of planetary science and geology are not easily available to the dreaded "non-subscribers". It is like they are screaming at me: "YOU CAN'T HANDLE THE TRUTH". Good, I feel better now.)

"Quaerendo inventis"

The Village of Staithes a couple of miles from us on the Yorkshire coast is a popular site for Geology students.
Here is a good site dedicated to the location. The Sea Cliffs give a good section through the Cleveland Ironstone of the Middle Lias (Lower Jurassic). It's a Marine succession, lots of Fossils and a couple of good harbourside pubs.

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It's a Marine succession, lots of Fossils and a couple of good harbourside pubs.

This could go in so many directions.

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Never attribute to malice what can be adequately explained by ignorance or stupidity.
Isaac Asimov

Is this in the same location as Saltburn?

Saltburn is a few miles up the coast. How come you know of Saltburn?.

Geology finishes at Saltburn, from there on it's the Tees Flooodplain.

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Because I told him, here is a link to my albums I have taken some geological pictures of Saltburn

Yes, upload them to your profile albums here on Baut and then put a link to the page like I have.

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You can please some of the people all of the time and all of the people some of the time. But you can not please all of the people all of the time.

"Why change passwords when you've got a baseball bat?"

And you did more than that - I now have a cool 'iron ball' rock from Saltburn. Plus some other rocks.