Here is some
more Carolina Bay information. To my thinking, this has got to be Impactor related. And the dating appears to be older than the Clovis Comet timeline. If you
look at this Google Earth Shot, it is like looking at the effects of a shotgun shell being fired at a target, off to a slight angle. And these landmarks are found all over the North American continent, not just in the Carolinas. This points to some HEAVY bombardment from outer space. To acheive this, the Impactor would have had to break apart, waste most of it's energy in an atmospheric burst, and then the reminents striking the earth at many places, some greater than others.
And here is
another picture. If you look closely, you can see that there are much older ovals, that have practically disappeared, and newer ones on top of the older ones. Clearly, this is not just a "one shot" deal, but occurs constantly, geologically speaking. Sort of makes one feel less than secure from the danger of being destroyed some day when you least expect it.
![[Image: cbaymbso.JPG]](http://abob.libs.uga.edu/bobk/cbaymbso.JPG)
This abstract does a pretty good job of covering the details of the Bays and their implications.
Quote:A COMET AS THE BAY FORMING MECHANISM *
One other aspect peculiar to comets may be important to the genesis of the Carolina Bays. Because of the volatile content in a comet nucleus, a collision trajectory may not result in actual impact. Observations of meteors and fireballs indicate that some of these objects break up as they enter the Earth's atmosphere and sometimes explode in the air.
The 1908 Tunguska fall in Siberia is commonly regarded as the explosion of a very small comet nucleus. Hartmann (1973, p. 146) said that the explosion, estimated to be 1021 to 1023 ergs, knocked a man off his porch 38 miles away. Trees as much as nine miles from the impact site were felled radially outward by the shock wave, whereas trees at ground zero were merely denuded of their branches and left in growth position. Baldwin (1963, p. 37) added that trees in protected locations such as deep valleys remained standing and in some cases were still alive. According to Hartmann ( p. 146), by 1928 when trained observers first visited the site, they found the impact site to be pockmarked with a series of shallow, funnel-shaped depressions of variable width but not more than four or five meters in depth. No meteorites were discovered. Baldwin (1963, p. 37) noted that in 1928 the original forest vegetation was replaced with tundra except in the craters where swampy vegetation was already well established Hartmann (1973, pp. 146-147) summarized the evidence supporting a cometary origin for the 1908 fall:
1. The object evidently exploded in the air, since trees at "ground zero" stood upright but were stripped of branches. A loosely consolidated ice comet nucleus would be expected to volatilize and explode before it hit the ground.
2. The lack of meteorite fragments is consistent with our picture of a predominantly icy nucleus.
3. A 1961 expedition recovered soil samples that contained small spherules believed to be part of the object. The spherules would be consistent with the idea of an admixture of small grains of non-icy "dirt" in the dirty iceberg and their spherical shape could be the result of sudden melting during the explosion.
4. Observations of the motion of the object across the sky indicated that it was traveling toward the earth probably in retrograde motion at a very high velocity, perhaps 50 km/sec, which would be typical of a comet but not of ordinary meteorites. .
5. For weeks afterward, the night sky in Europe and Russia was anomalously bright. This may have been due in part to atmospheric interaction with tail and coma material (although the comet was too small to have been noticed prior to the collision, being on the order 101g to 1011g in mass instead of about 1018g, typical of observed comets).
Multiple shallow craters of variable widths, a climax vegetation destroyed except where topographically protected, the absence of meteoritic finds, a high velocity but low angle trajectory, plus a shock wave felt at least 38 miles and heard 620 miles from the impact site suggest a cometary explosion before actual impact. Hartmann stated that the Tunguska fall was a small comet nucleus. If such a singular event happened once, it could happen at least once more.
But if you think that this is less than worrisome, consider this. While these impactors break up in the atmosphere, there are many more that actually expend their energy upon striking the planet. There is no way of telling which is tme more prevelent, but there are still many, may earth strikes.
Also, it is slowly becoming clear that most major disruptions to human civilization were the direct result of celestial impacts, which disrupted the agricultural and climate conditions, resulting in collapses of civilizations. Even the "so called" Dark Ages are now being attributed to the aftermath of bombardment.
The Dark Ages : Were They Darker Than We Imagined?, By Greg Bryant. This is a very fascinating article. Here is some of it.
Quote:Mike Baillie is Professor of Palaeoecology at Queens University, Belfast, Northern Ireland. He is an authority on tree rings and their use in dating ancient events (every year, a tree adds a "ring" to its trunk as it grows - good years are represented by thick rings while bad years are represented by thin rings). He conducted a complete (and continuous) review of annual global tree growth patterns over the last 5,000 years and found that there were five major environmental shocks that were witnessed worldwide. These shocks were reflected in the ring widths being very thin. Wanting to know more, he turned to human historical records, and found that the years in question (between 2354 and 2345 BC, 1628 and 1623 BC, 1159 and 1141 BC, 208 and 204 BC, and AD 536 and 545) all corresponded with "dark ages" in civilisation.
Most people who are fairly knowledgable of astronomy, are familiar with the Torids, a meteor show(comet debris tail) that the earth goes through annually. Usually it is accompanied by a shower of debris, known to have come from the bread-up of the comet Encke, which had to have been one HUGE comet. But we do not cross it's main path often.
Quote:The calculations for the Taurids suggest that we pass through the core of the meteor stream approximately every 2,500 years - today, we are passing through the outer edges. The last two occasions when we passed through the core were in 2200 - 2000 BC and in AD 400 - 600. The epoch around AD 3000 looks like being a fun time too - the Y2K doomsayers can always say they just got the millennium wrong.
If you will note the dates above. The first timeline, 2200-2000 coincides with the end of the Bronze Age, and the 400-600 period that of the Dark Ages. Could this be just a coincidence? My guess is no.
Quote: "A large fraction of the objects on Earth-crossing orbits, of all dimensions, are the daughter products from the break-up of a giant comet some time during the past 100,000 years, dynamical studies suggesting around 20,000 years as likely. All that is suggested here is a break-up similar to that undergone by P/Shoemaker-Levy 9 in 1992, except by a comet at least 100 kilometres across and in an orbit crossing from Jupiter to the Earth.
The core of the complex...evolves to have a node near 1 AU every millennium or so, at which time the Earth is bombarded by many [large] objects in episodes at certain times of year. It is these events that dominate the hazard to humankind. Such an episode would last for a century or two."
We have a pretty good idea that there are some HUGE comets out there in the Ort Cloud, and they are mainly long term comets, so we cannot project their danger until they enter the inner solar system, and are affected by Jupiter's gravitational pull, which will alter it's orbital path. If a comet can be 100 km or more, the danger presented it unimaginable.
Also, remember, asteroids are made up of the same material as that of comets. All are material from the original forming of the solar system. The only difference is that comets still retain a larger amount of volatile, frozen gasses, that have not vented out. But they still have large amounts of solid components. And most inner orbital asteroids are nothing more than comets that have already broken up and assumed more stable orbits.
Is Global Warming worth worrying about? Should we be worried about a warmer planet? Or should be be Really concerned about some huge object dropping in, from outer space, and obliterating civilization, on moment's notice? I'll let you decide that one, I've already made up my mind, a long time ago.
