[meteorite-list] Ice-rafted rocks on "dry-lakes"

From: Michael Mulgrew <mikestang_at_meteoritecentral.com>
Date: Fri, 29 Aug 2014 14:50:53 -0700
Message-ID: <CAMseTy0B5SdgkG4N5D04fDgdd1+3AfYWiZEtN_mCHvxF=eQ5ZA_at_mail.gmail.com>

Not only was this "old news" to meteorite hunters, the reports all
make it seem like this only occurs at Racetrack Playa in Death Valley.
I've personally found evidence of ice rafting at at least two other
distinct locations:


Tyler Valley, CA: http://mikestang.com/user/cimage/TylerValley09.JPG
General Dry Lake, CA: http://mikestang.com/user/cimage/general11.JPG

My photo from General is one of my favorite things I've ever seen
while wandering in the Mojave Desert.

Michael in so. Cal.

On Fri, Aug 29, 2014 at 12:20 PM, Michael Farmer via Meteorite-list
<meteorite-list at meteoritecentral.com> wrote:
> I've known this for many years. Why this is "new" I have no clue.
>
>
> Michael Farmer
>
>> On Aug 29, 2014, at 12:18 PM, Jim Wooddell via Meteorite-list <meteorite-list at meteoritecentral.com> wrote:
>>
>> Hi Bob and all!
>>
>> When I first got into meteorites, I was shocked people were still talking about is as some kind of
>> magical thing that hadn't been figured out!
>> I think all this does is re-affirm what many already knew. I did not take it as anything new at all!
>> I know of the work a few of you did about a decade ago, but ice rafting has been known for decades.
>> Disappointed that this made it "official" as it's been official in my mind for years and years....not to mention a video I posted about a year or more ago of ice sheets that were carrying rocks slamming
>> into the shore in heavy winds. But whatever. I would still contend wind and water, without the need for ice, can do the same thing. Anyone who has tried to walk across a moist (almost muddy) dry lake knows how slippery they become!
>> The power water and wind has is amazing!
>>
>> I get a kick of the giant rock ice-rafting picture!!
>>
>> http://www.fvalk.com/images/Arctic/1991/Rock%20conveyor.jpg
>>
>> Jim
>>
>>
>>
>>
>>
>>
>>> On 8/29/2014 10:53 AM, Robert Verish via Meteorite-list wrote:
>>> It's now official. We can stop calling them "sailing stones". New video shows that playa rocks are being barged across the lakebed.
>>> Apparently, wind-driven, floating sheets of ice are dragging or pushing the rocks leaving their "tracks" in the wet lakebed sediment.
>>>
>>> Photos in the article show tracks of rocks that make tight turns and circle back into the direction from which they had come. This shows that,
>>> in these cases, the rocks are locked into the ice-sheet.
>>> http://images.realclear.com/256104_5_.jpg
>>>
>>> Bob V.
>>
>> --
>> Jim Wooddell
>> jim.wooddell at suddenlink.net
>> http://pages.suddenlink.net/chondrule/
>>
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Received on Fri 29 Aug 2014 05:50:53 PM PDT