[meteorite-list] Scientists Excited About Potential ImpactCraterSite in...

From: Gerald Flaherty <grf2_at_meteoritecentral.com>
Date: Mon May 23 18:19:04 2005
Message-ID: <002e01c55fe5$69737150$2f01a8c0_at_Dell>

What a GREAT Story!! Jerry
----- Original Message -----
From: "Sterling K. Webb" <kelly_at_bhil.com>
To: <MexicoDoug_at_aol.com>; <baalke@zagami.jpl.nasa.gov>;
<meteorite-list_at_meteoritecentral.com>
Sent: Monday, May 23, 2005 11:26 AM
Subject: Re: [meteorite-list] Scientists Excited About Potential
ImpactCraterSite in...


> Hi, Doug,
>
> The article Ron cited was a newspaper article. It contains what the
> reporter
> understood and could remember and we all, sadly, know how that goes! It's
> only a little
> muddled, but I was impressed that the news in Springfield, Missouri, did
> so relatively
> well.
> You'd have to know Springfield, Missouri to appreciate that, in the
> "cultural capitol"
> of the Ozarks. I can be snide about the Mountain William ethnicity, being
> one myself, down
> to the missing tooth, but nobody else better.
> Go to the link:
> <http://geosciences.smsu.edu/faculty/Evans/impacts.htm>
> If you move around through Evans' site, you'll see all the geological
> evidence nicely
> presented. He is the guy who has done the drilling and investigation that
> brought
> attention (and proof of shocked quartz) to the impact site and why this
> conference was
> there in the deep Missouri boonies.
> As for the crinoid crowd, my old house, being elevated far above street
> level, has a
> winding walk and stairway up to the door that was made from slabs from the
> local quarry
> here on the Mississippi River's edge, hauled home by the two and threes by
> my father in our
> old Ford in 1939.
> These stones didn't just have fossils in them -- they are solid fossil,
> a carpet of
> crinoids and all their former neighbors in the Ordovician seas of the
> Mid-West. I think
> there may be some Devonian interlopers in there too.
> They were my geology text as a child and I spend many long summer hours
> crawling up and
> down the steps with my nose to the crinoids and other assorted critters.
> This course of study climaxed at the age of six when I took a small
> sledge hammer and
> masonry chisel to the steps and removed a large and perfect Dinorthis from
> them, much to
> the displeasure of my parent!
> He was wise enough to take me to the quarry's trash pile and let me
> select a few
> boxfuls of the most fossiliferous fragments to take home and disassemble
> if I promised to
> leave the steps alone, which I did, so my crinoid walkway is still intact.
>
> Sterling K. Webb
> -----------------------------------------------
> MexicoDoug_at_aol.com wrote:
>
>> Sterling & Ron commented::
>>
>> > If a meteorite created the structure, it hit some 300 million years
>> > ago
>> > when mid-Missouri was part of an ancient Jurassic Age sea. The strike
>> > obliterated plant-like crinoids, Koeberl said.
>>
>> Ancient Jurassic Sea 300 million years ago? ??????? I don't think
>> so...So,
>> what does the crinoidal limestone (Burlington Limestone) look like
>> there...did it "obliterate" FOSSILIZED REMAINS or the CRINOID ANIMALS
>> THEMSELVES...any
>> more info on this comment? Is it an assumption or based on some
>> observation
>> of some crinoids...I thought their age was ~345 million years old in
>> that
>> locality...but the article mentions a strike 300 million years old...and
>> the
>> article refers to a Jurassic age...Jurassic is only 136-190 million
>> years old
>> (in the Mesozoic), so the article seems to have left an ambiguous
>> chronostratigraphy- and that limestone is from the Paleozoic
>> Mississipian, or
>> pennsylvanian, I think...I hope someone could elucidate a bit on
>> this...Also, crinoids
>> are animals stuck with"plant-like" and the misnomer "Sea Lilies", but
>> look a
>> lot more like brittlestars, the feathery starfish in many parts of the
>> world,
>> just they frequently had long stems in prior ages that now look like
>> stacks
>> of coins when found fossilized.
>> Saludos, Doug
>
>
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Received on Mon 23 May 2005 06:18:56 PM PDT