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jlhredshift
Post  Post subject: Geo Photos  |  Posted: Sun Dec 11, 2011 9:37 pm
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Or like this from the site that hosts mine for free.

Gotta love rocks!

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Mon Dec 12, 2011 5:13 am
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Quote:
Gotta love rocks!

Yep.
Black Canyon of the Gunnison, Colorado
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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Mon Dec 12, 2011 7:27 am
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ever tried pulpit rock in norway ?

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Mon Dec 12, 2011 1:11 pm
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Both photos are very nice, mine is a shot of Papago Park in Phoenix Arizona.

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Wed Dec 14, 2011 10:03 pm
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i took the liberty of splitting off the geology-type pix and placing them under earth sciences

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Tue Dec 20, 2011 12:41 am
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Well, Ok. Here is a link to the photos I took at Kelly's Island, Ohio.
http://www.flickr.com/photos/jlhredshif ... 490787937/

Image

Gee, let's see, I show pictures of glacial features. Shocker!!!

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Tue Dec 20, 2011 12:54 am
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unconformity near Boscastle, Cornwall

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Tue Dec 20, 2011 1:01 am
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marnixR wrote:
unconformity near Boscastle, Cornwall


Ok, I'll take a shot at this. I don't think the lower rocks are folded, I think those are algal mats!

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Tue Dec 20, 2011 7:52 am
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to my eye they look very much like the rocks shown on this site

Fold in Late Devonian distal turbidites at Boscastle

where they are described as "Evidence for both pre- and post-granite Hercynian tectonism in Cornwall"

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Thu Dec 22, 2011 8:49 pm
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Pawnee Buttes, northern Colorado. James Michener renamed them Rattlesnake Buttes in his novel Centennial, and had one of his settlers die there from a snake bite. You can just see part of a very large wind farm on the left skyline.

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Fri Dec 23, 2011 12:47 am
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bunbury wrote:
Pawnee Buttes, northern Colorado. James Michener renamed them Rattlesnake Buttes in his novel Centennial, and had one of his settlers die there from a snake bite. You can just see part of a very large wind farm on the left skyline.


Great shot, and like the scene from Utah in "Forest Gump" it reminds me just how much sedimentary material has been removed and taken elsewhere!

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Fri Dec 23, 2011 2:12 am
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reminds me just how much sedimentary material has been removed and taken elsewhere!


But not always by glaciers!


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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Fri Dec 23, 2011 2:13 pm
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bunbury wrote:
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reminds me just how much sedimentary material has been removed and taken elsewhere!


But not always by glaciers!


Heh, heh, heh, true. The Mississippi Valley is something like six kilometers to bedrock, so we know where some of it went. A bunch more went to the Gulf of California; the outlet of the Colorado River. A bunch of the glacial stuff is in my back pasture, front yard, and the glacial lake bar way out back.

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iNow
Post  Post subject: Re: Geo Photos  |  Posted: Sun Jan 22, 2012 4:06 am
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Not quite a photo, but definitely a magnificent time lapse of Yosemite (select HD and go full screen, if possible).

http://vimeo.com/35396305

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Fri Feb 03, 2012 2:20 pm
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OK, I am only going to post the link to this one, it's not mine. But if any one knows where and when this occurred I would like to know because the exposed strata looks really interesting and I am going to guess that it is in a karstic area and in a place that speaks spanish. Could it be in Central America and we are seeing the K/T boundary exposed?[wishful thinking]

http://neverdividebyzero.com/files/2011/08/never-divide-by-zero-meme-43.jpg

Nevermind, found the news story at Nat Geo.

http://news.nationalgeographic.com/news/2010/06/photogalleries/100604-sinkhole-pictures-around-the-world-guatemala-city/

Better pics:

http://www.adaptcreative.co.uk/2010/06/guatemala-sinkhole/

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"The track of a glacier is as unmistakable as that of a man or a bear, and is as significant and trustworthy as any other legible inscription"
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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Fri Feb 03, 2012 5:09 pm
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The summit cairn of Green Mountain, west of Denver, is made up of precambrian granite rocks that washed down from the Rockies. The lower level conglomerate is younger material indicating the succession of eroded material that built up green mountain, the oldest rock being the youngest in terms of deposition here. Someone built a whimsical looking sightseer to top off the cairn, although from some angles it's slightly obscene.

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Sun Feb 05, 2012 4:21 pm
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This is the I-70 road cut through Dinosaur Ridge, which marks the uplifted eastern limit of the Rockies. The visible strata are Jurassic at the western (right) side, where some early dinosaur fossil finds were located, and cretaceous at the eastern (left) side where you can see fossilized dinosaur footprints in the whitish Dakota formation rocks. Hiking along the top you run into chunks of fossilized beach, complete with sandy ripples.

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Sun Feb 05, 2012 6:22 pm
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why was it cut that way ?

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iNow
Post  Post subject: Re: Geo Photos  |  Posted: Sun Feb 05, 2012 6:47 pm
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Minimize falling rocks hitting cars... help prevent avalanche type issues, I suspect.

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Sun Feb 05, 2012 8:36 pm
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I don't know why it was cut like that, but the shelves are wide enough for trucks so maybe they were designed for workers to access for blasting and removal of the debris during the final tidying-up stages of construction. The shelf with the barriers visible is open for pedestrians to get a close up look.


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iNow
Post  Post subject: Re: Geo Photos  |  Posted: Sun Feb 05, 2012 9:03 pm
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I should probably rethink my earlier conjecture. It could very well have been cut like that to allow for further study.


http://www.dmnh.org/main/minisites/anci ... rison.html

Quote:
The 320-foot-thick formation is named after the town of Morrison. Work on the west-facing slopes of the Dakota Hogback along with construction of Alameda Parkway and the I-70 roadcut has revealed complete and continuous exposures of this rock unit for study.

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Sat Feb 11, 2012 12:29 am
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East Cliff at West Bay, Dorset, England. A section of the Jurassic Coast which is a World Heritage site. The soft sandstone cliffs occasionally drop chunks onto the beach revealing fossils, so don't sit too close. The cliffs are the result of an ancient river estuary. The people in the picture are me, my sister and my brother in law and only Brits of a certain age will get the pun: the picture is called Cliff and the Shadows.

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Sat Feb 11, 2012 11:44 am
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reminds me a bit of the Glamorgan Heritage coast, which is also Lower Jurassic (i'll have to try and dig some of them from my collection)

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Sat Feb 11, 2012 4:19 pm
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That's a great photo, marnixR - nice composition with the foreground rocks, reflections and two levels of the cliffs receding. And yes, the cliffs do resemble the ones at West Bay. BTW when I wrote above that they were once a river estuary, I meant to say delta, not estuary.


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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Sat Feb 11, 2012 7:07 pm
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uplift> erosion> sediment deposition> induration> repeat

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Sat Feb 11, 2012 8:05 pm
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reminds me of the blonde joke

"how do you keep a blonde occupied all day ? give her a bottle of shampoo with the instructions : lather, rinse, repeat"

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Thu Feb 16, 2012 5:01 am
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Tuff cliffs at Bandelier National Monument, New Mexico. The tuff is compacted ash from the Valles Caldera eruption a million years ago. The larger holes near the bottom are Indian dwellings. Bottom photo shows an Indian flat screen TV.

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KALSTER
Post  Post subject: Re: Geo Photos  |  Posted: Thu Feb 16, 2012 7:27 am
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Quote:
East Cliff at West Bay, Dorset, England.
That's the photo you painted, no? Only the mirror image?

http://www.thescienceforum.com/art-cult ... post120919

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Thu Feb 16, 2012 7:42 pm
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Good grief, yes. I'd forgotten I posted that. The painting was done from a different photo taken early in the morning; this photo was in the evening so the shadows were opposite. Sister and bro in law live there so we go there quite a lot.

I seem to have a thing about cliffs. Wonder what that means.


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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Fri Feb 17, 2012 2:06 am
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If the board pleases, I have a request. Repeatedly in the 19th century writings of Lyell, the brothers Geikie, Prestwich, and Clement Reid there are reports of "submerged forests" which contain massive oak logs up to "eight to ten feet in diameter" in the glacial deposits of the UK (J. Geikie; 1894, pg 303), does anyone have a picture of these?

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Mon Feb 20, 2012 7:58 pm
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not exactly what you're looking for, but there the remains of a submerged forest near Amroth, West Wales
depending on the season, there's more or less sand covering it

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Mon Feb 20, 2012 10:16 pm
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Wow, I take it those trees do not grow around there anymore? That tree is definetly water worn.

Thanks.

By the way, did you get a radiocarbon date on that while you were there, AMS preferrably. :lol:

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Mon Feb 20, 2012 10:31 pm
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Went to Google maps/satellite and the underlying geology of that beach looks very interesting, folded, and etc.

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Tue Feb 21, 2012 7:38 am
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that's why we went on a GA trip to that part of the coast
btw, the remains are about 6000 years old

http://www.pemcoastphotos.com/photo_3434181.html

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Tue Feb 21, 2012 2:15 pm
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Great photos!!

The anticline on its side is interesting. Are the shingle along the beach all natural or has erosion control been employed with foreign rock? The ramparts are obviously there for that purpose.

Thanks.

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Tue Feb 21, 2012 8:30 pm
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most of the shingle is natural - only near Wiseman's bridge + Amroth have defenses been built
as far as i'm aware there's plenty of local stone for the purpose

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Fri Mar 02, 2012 8:29 pm
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for anyone interested in scenery with a geological slant the following site may be of interest : Geoscenic, from the British Geological Survey

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Sat Mar 03, 2012 4:29 am
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Hay Tor in Devon. Lake Havasu in Arizona. What's the connection?

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drowsy turtle
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 2:41 am
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All I really noticed at Hay Tor was a granite porphyry, and the pouring rain...

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 8:15 am
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is the link supposed to be geological, because as things stand they're more like each other's antonym - one is a hill the other a hole, one has water in the air, the other water in the hole

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 3:18 pm
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The London Bridge.

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 4:40 pm
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Yes, built of the same granite as Hay Tor and quarried nearby. Sold to an American for a couple of million dollars and shipped to Arizona to become a tourist attraction.


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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 5:31 pm
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still puzzling though : why would you ship a complete structure halfway across the world ?

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 6:08 pm
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marnixR wrote:
still puzzling though : why would you ship a complete structure halfway across the world ?

As was indicated, money.

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bunbury
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 7:09 pm
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According to Wikipedia:
Quote:
London Bridge has become Arizona's second-biggest tourist attraction, after the Grand Canyon.


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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 7:57 pm
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bunbury wrote:
According to Wikipedia:
Quote:
London Bridge has become Arizona's second-biggest tourist attraction, after the Grand Canyon.


really, not Meteor Crater ?

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 8:59 pm
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marnixR wrote:
bunbury wrote:
According to Wikipedia:
Quote:
London Bridge has become Arizona's second-biggest tourist attraction, after the Grand Canyon.


really, not Meteor Crater ?


Last time I was there it was almost like a private viewing.

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marnixR
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 9:00 pm
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wow ! any particular reason why ? is it far off the beaten track ?

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Sun Mar 04, 2012 9:12 pm
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marnixR wrote:
wow ! any particular reason why ? is it far off the beaten track ?


Yes, basically from Phoenix, its drive north to Flagstaff and turn right. But, the geology along the way is awesome, Sedona, volcanoes, etc.

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jlhredshift
Post  Post subject: Re: Geo Photos  |  Posted: Tue Mar 13, 2012 2:22 pm
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I was able to do a minor field trip this weekend. Below is an image of the south facing valley wall of the Grand River in Lake county Ohio, south of where I live. Generally speaking the Grand River valley cuts through the Devonian Chagrin Shale overlain by the Sharon Conglomerate. The formation of this valley is thought to have formed after the last Wisconsinan ice sheet had withdrawn sometime after +- 14krcybp. The second photo is of the shingle on the south bank of the river. Note that there are no igneous rocks among the shingle other than some resistant chert pebbles of ancient unknown age. I have had several personal conversations with researchers in this area and the cutting of the valley is considered to be an open question. The Pleistocene ice sheets overran this area every time, yet erratics are either rare or nonexistent and the few that can be found are supposed to have rolled down from the surrounding cliffs, which are covered with erratics of all sizes. The valley is sometimes several hundred feet below the surrounding area. The origin and evolution of the Grand River Valley is my geologic project, probably, for the rest of my life.

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Image

Link to the Flickr set:

http://www.flickr.com/photos/jlhredshift/sets/72157629211909314/with/6979215655/

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