Recently, Wisconsin geologists, both
amateurs and professionals, calling themselves crater hunters,
have been examining the evidence of craters of meteorite explosions
upon earth's surface which was prevalent over other areas in North
America back when Wisconsin and western Russia once shared the space
south of the equator. It has been estimated that the rate of falling
meteors were up to 100 times more than the rate today and with
falling space rocks the size of a football field, hitting the planet
every 10,000 years. The ancient bombardment occurred during the
Ordovician
Period.
Earth's geological history in terms of
continental drift stretches out over a thousand million years with
marked results in 500 million year intervals. Maps that depict these
ages and drifts are an estimation. Each 500 million year interval was
followed by about 100 million years of geological episodes called
rifting as continents broke apart due to erosion and other natural
phenomenon.
This
late Proterozoic era of the geological period, completing about 550
million years ago, was also the time of the Varangerian
ice age, signs of the formation of glaciers still visible today.
Paleontological evidence reveals that life continued through this
terrible time of ice and snow covered land. Much of the land was
massed together until the late Cambrian Period and explosion about
500 million years ago. Suddenly large animal life appeared about this
time, for reasons or origin that is still unknown. It was a
short-lived period in terms of geological ages when Pannotia
disintegrated to form four continents: Laurentia,
Baltica,
Siberia,
and Gondwana.
This
period lasted 45 million years and the area north of the tropics was
almost entirely ocean, most of the world's land was in the southern
supercontinent of Gondwana.
This age is best known for its marine invertebrate life, like
trilobites,
brachiopods,
found prolific in fossilized rock of the period. The climate was
mild, the weather generally warm with a high content of moisture.
When Gondwana settled on the South Pole during the Ordovician Period,
massive glaciers formed that caused shallow seas to drain and sea
levels to drop. Humanity could not be blamed by Global
Warming
alarmists because humans did not exist. Mass extinction ensued to
where 60% of all marine life and 25% of animal families became
extinct. Fossils of coral have been found from this period, but reef
ecosystems were predominantly algae and sponges with some bryozoans.
Because of global disturbances, reefs collapsed. It became towards
the period's end, the coldest time in Earth's history, unless you
believe the Snowball
Earth Theory.
This
period marked considerable changes for Earth with repercussions upon
the environment and animal/plant life. Coral reefs returned at
becoming prolific and the large glaciers melted. It is a significant
period where freshwater fish developed and life on land began to see
spiders and centipedes, as well as vascular plant life.
This
period was when there was a great supercontinent all connected. Great
changes were occurring and it was a dangerous time for plant and
animal life. Great deserts formed on land and the oxygen level fell
because of dwindled plant life. Mass
extinctions occurred. Mountain chains formed into what is the
Appalachians in the United States and the Atlas Mountains in Morocco.
Gondwana and Laurussia supercontinents collided. Despite a mass
extinction, it was also the appearance of the group of animals that
were ancestors of crocodiles and birds and a plethora of reptiles was
forming before the age ended.
This
age, made famous by the film based upon a novel, Jurassic
Park, was an age of
great plant growth, which also replenished the dwindled oxygen supply
from the previous age. It is a time when the Pangaea begins to break
up, the climate is warmed than today, a great time for dinosaurs in
its early period. Jurassic is named for the Jura Mountains on the
border between France and Switzerland where rocks of this age were
studied. The ocean is prolific with large fish, squid and coiled
ammonites. The great long-necked plesiosaurs, the legendary Loch
Ness Monster, swam
the great seas as vertebrates took flight in the form of pterosaurs,
the first birds.
Early
mammals were insignificant compared to the dinosaurs, some of which
may have been warm-blooded after discovering a dinosaur with
fossilized heart.
In
this period the supercontinent began its marked break-up that began
in the previous age. It is also considered the golden age of the
dinosaurs and new insect species emerged, as well as larger mammals
than the size of a modern rat. With the break up of the northern and
southern continents, there was marked regional differences in flora
and fauna. No great extinction occurred during this period, which is
partly the reason it is called the 'golden age' of dinosaurs. Marine
life was abundant, the skies became more crowded with pterosaurs and
their cousins, and great reptiles roamed the Earth. It was a time of
the Tyrannosaurus Rex and other great and dangerous creatures. During
this period, 65 million years ago, an asteroid hit Earth where the
Yucatan Peninsula in Mexico is today, forming the Chicxulub
impact crater. It caused an estimated 50% extinction of the world's
animal species (and some plant life). Some scientists argue that some
of that extinction was already taking place before the asteroid
impact.
If
you compare today's planet global map with this period, you can see
the difference in continent positions.
The
next global map shows the projected positions of continents 250
million years into the future.
What they will be called, if there is
anyone around to call it anything is anyone's guess.
It
certainly was not caused by the Global Warming theory that has grown
out of proportion and become so political today; as if scientists and
politicians can legislate and fund projects to change what is to
become inevitable. The major impact upon the changing Earth is the
local star we call the Sun. The other possible dangerous occurrence
is mass nuclear explosions that would have the effect of what
happened in the Yucatan Peninsula millions of years ago.
If
anything, humanity should be preparing to adapt to Earth's natural
changes, rather than waste time and energy over political alarmist
propaganda and junk scientist rantings.
I should imagine that humanity should be spending concerted energy and funds into space exploration and colonization of other planets with the advent of speed-of-light travel; rather than waste time waging war against each other, especially over religion and listen to political prostitutes and junk scientists in their alarmist rantings.
Watch this video about space and time ...
I would rather see, especially after our economical mess is straightened out, increase in support of NASA, space exploration and the expansion of humanity into the universe. But first we must become more intellectual and responsible, forming an Earth alliance (not a global government until we quit trying to kill and dominate each other), that would encourage and lead expeditions into worlds beyond our solar system. Hopefully we will not do what happened when the Old World discovered the New World and bring superstition and war-mongering with us.
Another timeline of Earth history and projected look into the future ....
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