[Rockhounds] glacial erratics (was Stonehenge geology resolved)

Tue Feb 3 19:19:13 PST 2009

Pretty good work Bryan. That looks like they do match up; now I don't  
feel that I have to drive up there and look for myself.

As to a glacier "randomly dropping" two huge rocks side by side.  
Slight chance I would say if one thought of them only as two huge  
rocks that just happened to get dropped there. If one was to think of  
them as two huge rocks from a big "landslide" onto the top of the  
glacier; it seems to me that they could be transported a long distance  
and remain side by side. However, let's not make a continental glacier  
to check this out. I would like to get back up to Banff and Jasper  
before they get ground down to a bump on the land.

Regards,

Lanny

On Feb 3, 2009, at 5:31 PM, J Bryan Kramer wrote:

> Well I had a try at it based on this shot:
>
> <http://www.pbase.com/image/73508329>
>
> And came up with this:
>
> <http://upload.pbase.com/image/108852525>
>
> via photoshop CS4
>
> As for why assume it was one piece, how likely is it that a glacier  
> would
> randomly drop two huge chunks of rock right next to each other.  
> Occam's
> razor says it is probably the same rock.
>
> BK
>
> On Mon, Feb 2, 2009 at 17:34, GLENN ANDREWS <LIpumpkin at msn.com> wrote:
>
>> Any others care to express their opinion on this?
>>
>> Well, if its broken into two pieces how does that make it one  
>> erratic?
>>
>> ----- Original Message -----
>> From: Lanny R<mailto:lanny.r at roadrunner.com>
>> To: Rockhounds at drizzle.com: A mailing list for rock and gem
>> collectors<mailto:Rockhounds at drizzle.com
>> :%20A%20mailing%20list%20for%20rock%20and%20gem%20collectors>
>> Sent: Monday, February 02, 2009 12:13 PM
>> Subject: Re: [Rockhounds] glacial erratics (was Stonehenge geology
>> resolved)
>>
>>
>>  I have a doubt about the "Big Rock," this Okotoks Erratic really  
>> being
>> one rock broken into two pieces. First, I don't recall ever seeing a
>> large rock that I was sure had obviously broken into two pieces where
>> it had settled in the middle so that the two pieces dipped inwards.
>> Secondly, I can't see any match in the layers between the two pieces.
>> That might be just a problem of how it is shown in the photograph, so
>> that one can't really see them all that well. Thirdly, the piece on
>> the right is more broken up and has a lot of  rusty layers, very
>> unlike the left piece.
>>
>> Any others care to express their opinion on this?
>>
>> Regards,
>>
>> Lanny
>>
>>
>>  On Feb 2, 2009, at 8:48 AM, pmodreski at aol.com<mailto:pmodreski at aol.com 
>> >
>> wrote:
>>
>>> Neat website about that big rock, Kreigh!
>>>
>>>
>>> Some erratics are big. You might enjoy the size of the biggest one?
>>> ?
>>>
>> http://culture.alberta.ca/museums/historicsiteslisting/okotokserratic/default.aspx
>> <
>> http://culture.alberta.ca/museums/historicsiteslisting/okotokserratic/default.aspx
>>> ?
>>> ?
>>> and the interesting legend of how it split in two.?
>>> ?
>>> Kreigh?
>>>
>>>
>>> And, alas, I'm afraid your post was a great disillusionment to me,
>>> because I couple of years ago I had visited, and was very impressed
>>> by, the Madison, Carroll County, New Hampshire, glacial erratic, a
>>> N.H. State "Wayside Monument" and locally known as "the largest
>>> known glacial erratic".? It is,
>>>
>>>
>>> "Madison Boulder is a huge granite rock measuring 83 feet (25 m) in
>>> length, 23 feet (7.0 m) in height above the ground, and 37 feet (11
>>> m) in width. It weighs upwards of 5,000 tons."
>>>
>>> Your Okotoks Erratic "Big Rock" in Alberta has?clearly got it all
>>> beat,
>>>
>>> "The Okotoks Erratic weighs 16,500 tons. It measures 9 metres high,
>>> 41 metres long and 18 metres wide."
>>>
>>> and?evidently holds the world record, as is stated in the very good
>>> Wikipedia article about glacial erratics,
>>>
>>> http://en.wikipedia.org/wiki/Glacial_erratic<
>> http://en.wikipedia.org/wiki/Glacial_erratic>
>>>
>>> Next time I'm in Alberta (never been there, actually), I've got to
>>> see it!
>>>
>>> Cheers, Pete
>>>
>>>
>>>
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>
>
>
> -- 
>
> ""It often seems to me that the night is much more alive and richly  
> colored
> than the day."
>
>                      Vincent van Gogh
> J Bryan Krämer
> North Florida, USA
> photos at:
> http://pbase.com/photoburner
>
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