[Rockhounds] glacial erratics (was Stonehenge geology resolved)

[Wayne Rasmussen]

Lanny,

I was somewhat bothered about the very same thing,   anyone out there have a 
better and different photo view ?

----- Original Message ----- 
From: "Lanny R" <lanny.r at roadrunner.com>
To: "Rockhounds at drizzle.com: A mailing list for rock and gem collectors" 
<rockhounds at lists.drizzle.com>
Sent: Monday, February 02, 2009 10:13 AM
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 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?
>> ?
>> 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
>>
>> Next time I'm in Alberta (never been there, actually), I've got to  see 
>> it!
>>
>> Cheers, Pete
>>
>>
>>
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