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WINDOWS TO THE UNIVERSE NEWSLETTER


During the last year, this question prompted a lot of scientific debate, because recently scientists found more evidence supporting two very different explanations of the K-T extinction. One of these theories suggests that a major increase in volcanic activity on Earth caused the dinosaurs’ demise by releasing enough dust into the atmosphere so that photosynthesis was blocked and food chains collapsed. The other suggests that the K-T extinction was caused by a cataclysmic impact between the Earth and an asteroid near what is now Chicxulub, Mexico. As with volcanic activity, the impact would have released huge amounts of dust into the atmosphere and interfered with global climate and ecology.

Although scientists generally agree that both volcanism and the Chicxulub impact were important factors in shaping the Earth’s ecology at the end of the Cretaceous, no one knows yet which was most important in causing the K-T extinction. You can read more about this debate on our pages about the K-T extinction and its causes, and on the NSF’s announcements of the latest research findings supporting volcanism and the Chicxulub impact as the primary cause of the K-T extinction.

http://evolbiol.ru/a...or/ancestor.htm

Click here: Ancestor's Tale, The - Dawkins R.A.
The position of the Chicxulub

http://evolbiol.ru/a...ges/img_015.jpg



http://www.windows.u...xulub.html&nl=4

Now, a team of 41 scientists from 12 nations has prepared a paper to specifically counter the volcanic and dual-impact alternatives, and provide a comprehensive review of the evidence linking a single impact near what is now Chicxulub, Mexico, to the K-Pg extinction.



One of the key arguments for impact is a well-studied clay layer that appears at K-Pg boundary sites across the globe, usually in association with melt-glass remnants, shocked minerals, and other materials generated by impacts. The authors point out that the layer thickness and the abundance of impact materials both increase as you get closer to the Chicxulub crater.



Additional studies, both in the field and in laboratory simulations and models, led to widespread support of the impact hypothesis. As it currently stands, the extinction resulted from the collision of a space rock roughly 10 kilometers in diameter into carbon- and sulfur-rich rocks beneath what is now Chicxulub, Mexico, yielding a crater that is more than 180 kilometers in diameter; regional tsunami, earthquakes and fires; extended (but not total) darkness; cooling temperatures and acid rain.

In some sites close to the impact, around the Gulf of Mexico and the Caribbean, there are two spherule-bearing layers, at times separated by sediment a few meters thick, and some of the recent controversy stems from this apparent duality. The scientists studying these layers say, however, that two layers does not mean there were two impacts; instead, the evidence suggests that there is a single layer that has been disturbed in some places by local seismic activity.

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--------------------------------------------------------------------------------
From:
To: Bclarkgemetria@aol.com
Sent: 4/1/2010 2:49:50 P.M. Eastern Daylight Time
Subj: Re: ASTEROID NEAR WHAT IS NOW CHICXULUB MEXICO


Interesting article, Betty. One of my interests, as you know.
I wonder about the IQ of scientists sometimes. Scientists claim Christians are silly for believing in the unproven. AND they sometimes spend entire careers trying to prove that nothing is proven (well, except their own wonderful insights, of course).

I've come to be convinced that neither impacts nor massive volcanic eruptions are neccessarily extinction causing events. It depends on when (time of year) and where (relative to the equator) the event occurs, and also the relationship to other things that are going on in that particular when and where (Milankovich cycles, position with respect to the galactic equator and relative motion through space, and of course Father's will in the matter which is often ignored completely).

Still, it's wonderful drama ... better than anything on TV or in the movies, and I love following the argument. Thanks again for sending it along.

[Jack777]

Thank you. Interesting. I think that your topic and thread show scientists are not uniform in conclusions based on the data at hand. It also shows that to the best of their knowledge, data, and technology they attempt to present findings that model what is the case, not present what they would like things to have been.

When Alvarez et alia first presented evidence they had to explain their findings most of us knew they were onto something that provided a rational explanation for their data. That was over 30 years ago.

In 2002 the discovery of The Silverpit Asteroid was announced. It is likely part of the original asteroid that split in two, with part hitting Chicxulub Mexico.

Have you noticed increased earthquake activity? The entire solar system is heating up, with planets heating up from the inside out. This is due to increased geomagnetism and solar activity. Some astrophysicists think the center of our galaxy is the reason for this, it is expelling increased energy in the form of radiation. There are other things as well, but it may very well be the mechanism that is affecting our sun. Concurrent increases in heat from the earth's core that alters the position and energy of convection cells would in turn increase volcanic activity, earthquakes and global warming. The same mechanism that is at play in the center of our galaxy would also affect asteroids. Systemic geological boundaries where there have been mass extinctions throughout the rock record have evidence of volcanic activity, leaving behind layers of volcanic ash. An impact or impacts on the order of 10km would be expected to shower the entire planet with this fine dust of bentonite and other clay minerals choking life out remote from the impact craters.

As an aside, scientists are the target of people who figure science is up to no good or we are all a pack of heretics in a super plot. That is not true.

Sometimes it takes a lifetime to tease facts from evidence. Maybe one is a car hop and makes his or her life's work doing that to earn money. If someone is a scientist and does science all his or her life, how is it people can be derisive of that and not the car hop? Being a scientist does not preclude love for God and His Son.

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Jack777, on 06 April 2010 - 08:53 AM, said:

Thank you. Interesting. I think that your topic and thread show scientists are not uniform in conclusions based on the data at hand. It also shows that to the best of their knowledge, data, and technology they attempt to present findings that model what is the case, not present what they would like things to have been.

When Alvarez et alia first presented evidence they had to explain their findings most of us knew they were onto something that provided a rational explanation for their data. That was over 30 years ago.

In 2002 the discovery of The Silverpit Asteroid was announced. It is likely part of the original asteroid that split in two, with part hitting Chicxulub Mexico.

Have you noticed increased earthquake activity? The entire solar system is heating up, with planets heating up from the inside out. This is due to increased geomagnetism and solar activity. Some astrophysicists think the center of our galaxy is the reason for this, it is expelling increased energy in the form of radiation. There are other things as well, but it may very well be the mechanism that is affecting our sun. Concurrent increases in heat from the earth's core that alters the position and energy of convection cells would in turn increase volcanic activity, earthquakes and global warming. The same mechanism that is at play in the center of our galaxy would also affect asteroids. Systemic geological boundaries where there have been mass extinctions throughout the rock record have evidence of volcanic activity, leaving behind layers of volcanic ash. An impact or impacts on the order of 10km would be expected to shower the entire planet with this fine dust of bentonite and other clay minerals choking life out remote from the impact craters.

As an aside, scientists are the target of people who figure science is up to no good or we are all a pack of heretics in a super plot. That is not true.

Sometimes it takes a lifetime to tease facts from evidence. Maybe one is a car hop and makes his or her life's work doing that to earn money. If someone is a scientist and does science all his or her life, how is it people can be derisive of that and not the car hop? Being a scientist does not preclude love for God and His Son.

Jack777,


Very well said. And so very informative, Thank you !



(quote)

Have you noticed increased earthquake activity? The entire solar system is heating up, with planets heating up from the inside out. This is due to increased geomagnetism and solar activity. Some astrophysicists think the center of our galaxy is the reason for this, it is expelling increased energy in the form of radiation. There are other things as well, but it may very well be the mechanism that is affecting our sun.


- - -

Jack777, when I read that commentary about the solar system heating up, it caught my
attention to the message I have been posting about the weather and the star Arcturus.


Weather joins the hip of Arcturus

http://www.absolutea...topics/Arcturus

As one of the brightest stars in the sky, Arcturus has been significant to observers since antiquity. In Ancient Greece, the star's celestial activity was supposed to portend tempestuous weather. Citations: Plautus


http://www.buybookso...ek.aspx?id=1671
Arcturus: Star of the Second Coming
by Daniel Speck


From Chapter 1:

Revelation in the stars