Mississippi Embayment

On 4 fév, 04:01, Jo Schaper jospamnotschaper34@5socket78dot9net
wrote:
Jim Lillie wrote:
Interesting article in the Jan *Scientific American*. Yes, I am a
slow reader now.

Several hundred Megayears ago the collision between North & South
America raised the East/West *Ouachita* mountains across Oklahoma and
Arkansas. Later this blocked access to the Gulf, continental drainage
was to the north and west.

This part of the continent moved over the Bermuda Hot Spot from
central Kansas 115 Mya to central Mississppi 70 Mya. During the
mid-Cretaceous 'super plume' events this raised a N/S arch several km's
high, which eroded back down in abut 10 My. Then the 'super plume'
activity quieted, the eroded arch subsided, leaving the embayment
through the mountain range flooded from the Gulf. Continental drainage
now shifted to this southern access, and sedimentation filled in the
embayment.

Jim Lillie

Being as I am familiar with the general geology and topography, there
are several things
about this explanation which do not compute.

The Ouachitas (@ 300 million years old) are still quite definitively
steep highlands. Ok, they are not real mountains, but they are ridge and
valley system some hundreds to 1500 ft higher than the coastal plains
to the south. The Ozarks (@ 900 Ma to 1.5 Ga)are rounded and worn, but
still quite distinctly hills, caldera rims, and so forth.

The article asks us to believe that the Mississippi Embayment rose
multiple km a mere 70 Mya, and then wore down in 10My to a flat, mostly
featureless plain, at about 200-400 asl, with 1-3 kms of sediment below
the surface until you hit bedrock.

If such extreme inflation/deflation occurred, where are the brecciated
zones surrounding the hot spot active zone?

Where is the residue from that removed rock? What sort was it?

How did the South Central Mo Ozarks remain so tectonically unaffected?
(Flat lying beds stayed flat lying, and steeply sloping beds on the east
side of the preCambrian seem basically unaffected by any systematic
regional faults.

There is no topographic lowland trough from central Kansas through
Mississippi similar to that tracing the Yellowstone hot spot. There also
is not a basaltic trace, nor any metamorphics, either of which I would
expect. I would expect such a thing, if this migrating hot spot theory
is true. The authors talk about the Crater of Diamonds laprolite pipes--
those are to the southwest of the Embayment, not to the northwest as one
might expect of such an arch coming in from Kansas.

As I understand their presentation, the hot spot was active in
mid-Kansas, quiescent through eastern Kansas, SW and SC Missouri, and
then all heck broke loose under the New Madrid zone. They say this was a
time of superplumes the world over, but do not cite other examples.

The rock between eastern Kansas and the Embayment is mostly Paleozoic in
age and nearly flat lying (a very small regional dip) to the Ozark
Highlands, then a steeper dip on the eastern side to the Mississippi.
Not Mesozoic. The transition from Ordovician to Quaternary surface
deposits is quite abrupt. Only a few places (Crowley's Ridge) do
Cretaceous/Tertiary strata exist at the surface. Geological cross
sections of the subsurface continue the pattern, though layers are
jumbled due to faulting.

Finally, the New Madrid area faulting predates the Cretaceous, as
indicated by subsurface geologic faulting. They cite this faulting as
related to the formation/collapse of the hot spot arch-- it actually
predates it.

While the Van Arsdale and Cox paper presents an intriguing scenario,and
might explain some previously obscure diatremes in eastern Missouri, as
well as subsurface igneous emplacements in the rift zone, I'm not yet
convinced this explanation doesn't raise more questions than it answers.- Masquer le texte des messages précédents -

- Afficher le texte des messages précédents -

Congratulations Jo !

Excellent and superior indeed reply proceeding of what should be
rightly called a True Geologist's mind. In fact somehow you are
recovering your free mind and free will and breaking free then of the
dogmatic Universilities teaching so painfully evident in poor Jim 's
input.

In fact, Jo, you only need as Don, to get the correct basis of
reasoning imparted by the True Geology and you will be able to
reconsider all Earth relief in this light. Indeed the correct approach
does not change the hard facts, but it brings a true understanding
based on well known engineering process to account for such. Moreover
it has to be coherent with the whole spectra of data imported from all
disciplines i.e. Physics; Chemistry( low & high energy alchemistry
indeed) , Palaeontology, Archaeology, History, Ethnology, Agriculture,
Medecine ( endocrinology and genetic manipulation through circumcision
manipulation ) , Psyche vs Soma interaction, History of the sects vs
ET input

We have to get away from the specialisation & ultra specialisation
pronés by those mind programming bodies known as Universilities !
A TRUE GEOLOGIST IS NECESSARILY A UNIVERSAL MIND !
( who has all the answers indeed )

.... and this something towards which you are obviously tending.

With best regards


Sir Jean-Paul Turcaud
Exploration Geologist & Offshore Consultant
Mobile +33 650 171 464

Australia Mining Pioneer
Founder of the True Geology
http://www.tnet.com.au/~warrigal/grule.html
http://users.indigo.net.au/don/tel/index.html
http://members.iimetro.com.au/~hubbca/turcaud.htm
http://www.abc.net.au/rn/talks/bbing/stories/s28534.htm

If you have all the answers, Turdball, then why aren't you even close
to running this planet? Maybe because you truly are insane!

Saul Levy


On 4 Feb 2007 00:41:59 -0800, wrote:

Congratulations Jo !

Excellent and superior indeed reply proceeding of what should be
rightly called a True Geologist's mind. In fact somehow you are
recovering your free mind and free will and breaking free then of the
dogmatic Universilities teaching so painfully evident in poor Jim 's
input.

In fact, Jo, you only need as Don, to get the correct basis of
reasoning imparted by the True Geology and you will be able to
reconsider all Earth relief in this light. Indeed the correct approach
does not change the hard facts, but it brings a true understanding
based on well known engineering process to account for such. Moreover
it has to be coherent with the whole spectra of data imported from all
disciplines i.e. Physics; Chemistry( low & high energy alchemistry
indeed) , Palaeontology, Archaeology, History, Ethnology, Agriculture,
Medecine ( endocrinology and genetic manipulation through circumcision
manipulation ) , Psyche vs Soma interaction, History of the sects vs
ET input

We have to get away from the specialisation & ultra specialisation
pronés by those mind programming bodies known as Universilities !
A TRUE GEOLOGIST IS NECESSARILY A UNIVERSAL MIND !
( who has all the answers indeed )

... and this something towards which you are obviously tending.

With best regards


Sir Jean-Paul Turcaud
Exploration Geologist & Offshore Consultant
Mobile +33 650 171 464

Australia Mining Pioneer
Founder of the FALSE Geology