Recovering the Lost World --Jno Cook
Expanding Earth.
$Revision: 16.8 $
Contents of this file:
[Pterodactyls]
[Expansion]
[S. Warren Carey]
[Questions]
[Endnotes]
Pterodactyls
Ted Holden has expounded for years on the problems the early dinosaurs would have had walking and running, and most elegantly on the problems Pterodactyls with 30 and 50 foot wing spans would have had in lifting off the ground and flying. He offers no solution except to suggest that the force of gravity might have been lower in the age of the dinosaurs. Robert Bakker, a researcher and expert on dinosaurs, has proposed various bony ligaments which would lace the necks of the large dinosaurs to help hold up their heads. [note 1]
If gravity has changed since the age of the dinosaurs, it might have been due simply to the Earth expanding and becoming more massive. Expansion would increase gravity if the center of the Earth filled with new material. This is somewhat of a radical suggestion, and most people are not at all comfortable with the creation of matter.
In the 1960s oceanography came up with some surprises. First of all, it was recognized that the ocean beds were not filled with miles and miles of sediment, as would be the case if the world's rivers had been carrying silt to the oceans for four billion years. Instead it was found that the ocean floors were geologically new.
Expansion
![[Image: Atlantic Floor
Spreading]](bin/image7.jpg)
Image: Atlantic Floor Spreading
The second surprise was the discovery of the Atlantic ridges, a series of parallel ridges which run mostly north and south throughout the Atlantic. The ridges show a series of parallel magnetic reversals of the top layers of rock, matching east and west from approximately the center of the Atlantic. Further research has found the same in the Pacific and Indian ocean, although of a more complex pattern. Geological dates of the ridges also match from the center out. The oldest ocean beds are just east of China, with smaller stretches just off the North American east coast and in the south Caribbean. These regions all date from the Jurassic era, 200 to 150 million years ago.
![[Image: Pacific Floor
Spreading]](bin/image5.jpg)
Image: Pacific Floor Spreading
It looked like the Earth had indeed been expanding, and in fact it looked like there were no oceans before the Jurassic. That means the original land mass (Pangea, the single land mass which had already been suggested as the parent to all of today's continents) must have covered all of the Earth at one time. The start of ocean floor spreading (as it is called) dates from after the first appearance of the giant dinosaurs during the Jurassic.
You can look at a globe and make some simple calculations. Subtracting the estimated spread of the Atlantic and Pacific from the current circumference of the Earth (25,000 miles) gives an earlier circumference of about 12,500 miles. The Earth had roughly doubled in diameter.
Gravity is a function of the mass divided by the square of the radius of the Earth. The mass of the Earth, assuming no change in density for the new material, is a cubic function of the radius. Thus gravity is linearly proportional to the radius of the Earth. As Earth expanded, gravity increased in proportion. [note 2]
Since the radius has doubled since the Jurassic, 200 million years ago, gravity has increased also by a factor of 2. The change in gravity is marginal over time spans of 10 or 20 million years (1 or 2 percent per million years), but certainly enough over 100 million years so that Bakker does not need to speculate about how rigid ligaments held up dinosaur necks, and Holden need not question the 50 foot wing spans of Pterodactyls. The really 'giant' dinosaurs date to the Jurassic age, 200 million years ago, and the remaining 'evolutionary data' fits: after each of the many extinctions, the large animals never returned in the same sizes -- gravity in each instance had increased significantly, and put the larger animals at a disadvantage. The first mammals of the later Tertiary period are also very large at first, and these disappear in turn. Plant go through a similar cycle, with only the climatically protected Sequoia as survivals. [note 3]
S. Warren Carey
S. Warren Carey in two books, "The Expanding Earth" (1976) and "Theories of the Earth and Universe" (1988), suggests that 200 million years ago (at the Jurassic) the Earth was only half its present diameter, and completely enclosed by Pangea, the single landmass which today has been torn to smaller pieces. Expansion of the Earth split Pangea, forming the current ocean basins in the process, which filled with water -- some as runoff of the shallow continental seas, most of it probably welling up from within the Earth. Ocean-bottom thermal vents and volcanoes spew out water and water vapor. The second book suggests that matter is being created in the center of the earth.
Carey and his followers in fact suggest that the expansion is not linear (as I suggested above) but exponential. They say very little about gravity. Many of Carey's followers are not comfortable with his second book and are extremely reluctant to suggest the creation of new mass. The creating of mass does not contradict current physics, and is in fact a postulate of quantum theory. But many people have serious philosophical problems with the creation of anything new -- seemingly out of nothing.
Before the Jurassic there were no oceans, only shallow seas located on the stretched-flat inland areas between mountain ranges. There may have been a southern ocean. This was also before the recent orogeny - the set of mountains identified as the Rockies, Alps, Himalayas. Mountain ranges are clearly the result of a solid land mass crumpling as the radius of the substrate on which it rests increases. Mountains are thus hollow, and provide easy access to the surface for material welling up from the substrate. The large flat mid-continental basins are stretched areas, often with faults where the Earth shears (due to stretching of the land mass). But the process of stretching land masses and curling the edges (mountain ranges) can only account for some of the expansion. At some point the original single continent will rip and the fault will widen and fill with new material from within the Earth. This clearly shows in a mapping of ages of the ocean crusts. The shape of the continents are exactly what would be expected if the peel of an orange were to be forced onto a sphere of twice the original diameter. Wedge shaped areas would remain after the original peel started to crack.
Antarctica was originally attached to Northeast Asia (as fossils testify), and butted up against North America. Antarctica eventually was rotated and pushed to its southern polar location by the new ocean floors which welled up around it. Australia touched up against South America on one side (and marcupial mammals ended up in both continents) and Southeast Asia and India on the other. East Africa was up against India. North America was located against Europe, South America against Africa. And both touched Asia/Antarctia above the equator and Australia below the equator. Europe had not tried to pull away from Africa yet. As you can see, this was a small globe.
Questions
Some questions remain. Is the Earth still expanding today? Even if this were so, it would be totally undetectable. Carey and others think expansion continues, at an increasing rate.
Did the expansion happen gradually or in spurts? Carey suggests a continuous exponential expansion. Exponential expansion would reduce earlier changes to less significance, that is, the expansion only became very noticeable after the Jurassic. Other have suggested, based on biological (evolutionary) considerations that gravity may have increased in the period before the giant dinosaurs of the Jurassic and than have fallen again.
The bands of magnetic reversals detected in the east-west direction from the center of the Atlantic ocean floor suggest sporadic expansions. The intensity of the reversed orientations are weaker compared to the normal orientation. It is possible that the reversals mark plasma contacts with Saturn, although the data for reversals of magnetic orientation are sporadic and do not seem periodic. The number of reversals increase in frequency about 35 million years ago (some 20 instances), and become much more frequent during the last million years. These last are recorded in sedimentation layers in the Balkans, and thus may represent data not available for earlier periods as found only in molten rock.
Where did all that new material come from? It has been suggested that almost all of it was added as the fall of asteroids and comets, but an exponential expansion suggests an ongoing process related to the mass already in existence, not to the surface area. You might suspect, offhand, that the added mass came from Saturn as a transfer of protons. At any rate, it is an awful lot of additional mass. The mass of the Earth would have increased seven-fold in the last 200 million years. But this represents only a very small fraction of the mass of Saturn, somewhat around 1 percent. [note 4]
Some researchers have agreed in concept with the idea of an expanding Earth, but not in scope. Some have suggested that only a 20 percent reduction in gravity would suffice to allow the giant dinosaurs and plants. But this does not match the additional circumference due to increased oceans, or the age of the ocean bottoms.
It might also be suggested that the Earth simply bloomed, that is, it became larger without gaining mass, like bread rising in an oven. But that would decrease gravity, not increase it.
Similarly, the plasma theorists suggest that gravity is a function of the electrical conditions of the Earth, and is perhaps effected by electrical fields exterior to the Earth. Again, this does not account for the increased ocean bottoms.
The land masses and the ocean bottoms are distinctly different materials. De Grazia sums it up, with..
"The crust of Pangea was "sial," heavy in silicon and aluminum elements, as is the crust today. Its depth was uniform; at about 30 kilometers it developed, but very gradually, into heavier silicate magnesium mixtures ('sima').""... All the recent vulcanism, seismism, and crustal churning has added little to the sial, for the magma below is not provided with the materials for its manufacture."
"There is no evidence that the oceans have destroyed and buried continental material, or could have, since the sial and its sediments are lighter than the sima of the ocean floor."
"In Rittmann's work on volcanoes, we find the following words: 'Since the subcrustal magma is not capable of providing sial by differentiation, we must conclude that little has been added to the sial since the beginning of geological history.'"
"If this mass of land had been accompanied from the early assigned ages by the oceans and ocean basins, it would not have eroded into the sea, for the sea normally pushes back erosion. An exception is the mouths of rivers, but river deltas explain only a small fraction of the vast continental shelves and slopes."
"The fossil marine beds that are found upon the land today, even high up in the Himalayas, are once-flooded land-beds or they are Pangean shallow water formations. They are the relics of deluges, tides and certain risings visited upon the world by post-Pangean catastrophes. There are few fossil marine beds laying conformably upon plutonic or basaltic sima."
-- Alfred de Grazia "Chaos and Creation" (1983)
For 3.9 billion years the crust of the continents has been floating on the substrate. Then some 200 million years ago heavier material from within the Earth started to well up to fill cracks which had started to develop. It is the spreading ocean floors that has moved the continents.
We can recognize unfilled cracks today. One runs almost the whole length of Africa and on into sotheast Asia.
Endnotes
Ted Holden at
[http://www.bearfabrique.org] and Robert Bakker "The Dinosaur
Heresies" (1986)
[return to text]
Gravity is expressed as
a = f ( m / r^2 )
Mass is expressed as
m = f ( r^3 )
Thus as the Earth gets larger, gravity increases because of the
increased mass, but decreases because it takes us further from the center
of the Earth:
a = f ( r^3 / r^2 ).
This reduces to a = f ( r )
[return to text]
There are suggestions also that gravity may have reduced initially
during the time preceding the Jurassic, and then started to increase. This
is mainly based on the rather compact proto-mammalian and proto-saurian
animals of the earlier Permian period.
[return to text]
If the diameter doubles, the mass will increase to 8-fold.
The increased mass is thus:
(7/8) * 6 = 5.25 * 10exp24 [kg]
The fractional decrease in mass of Saturn is:
5.25 / (568 + 5.25) = 0.0091 -- about one percent.
[return to text]
Calculations are in Unix bc notation, where ^ denotes
exponentiation; the functions (a)rctangent, (s)ine, and (c)osine use
radians; angle conversions to radians or degrees by the divisors rad=.017+
and deg=57.2+; other functions are shown as f( );
units: million == 1,000,000; billion == 1,000,000,000;
one AU == 93,000,000 miles.
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This page last updated: Thursday, March 27th, 2008
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