JohnD.+Precambrian+Time

__//Precambrian Time, the why?//__

I like a challenge, haha that's basically it and well I'm interested to know what was the start of it all. I know this project will probably drive me insane but if its really that complex than I hope to break it down so even a little kid can understand it. They'll be like "Hey mommie!! wanna learn about the Precambrian Era?" and the fact they said the word "Precambrian" is just going to make there mothers blush. **//__Precambrian Time__//** **//__Time Period__//**

 Before the Precambrian Time there was nothing but complete and utter darkness, the universe was just a microscopic speck holding all of life; the slightest touch could make it explode. During this "lovely time" Earth is born, oceans form, Oxygen becomes one with the world, the first sedimentary rocks appear, Bacteria roam earth, Ice ages take place, Soft-Bodied multicellular organisms develop and last but not least the first mass extinction occurs. Some time after the Precambrian Time, the Paleozoic Era begins and man is that one crazy era. The Cambrian Explosion explodes bringing up some organisms with stern parts, like shells and outer skeletons. Our worms and jellyfish and sponges appear. Sadly 95% of the life in the oceans disappeared during the Mass Extinction. All this just 4.5 billion years ag o and dragging the evidence till today, pretty amazing.

**//__Plate Tectonics__//**

 The oldest super continent is believe to have formed during the middle of the Proterozoic (1100 million years ago.) This is how things use to be, continents that we now know as North America were in the center, South America to the east and Australia and Antarctica to the west. Rodinia (one of the Super Continents) parted in half, by the likes of the Panhalassic Ocean. One of the parts was North America that transgressed south crossing the pole. The other parts were Antarctica, Australia, India, Arabia, and other parts of China parted towards the North Pole. In the end of the Precambrian time these 2 parts meshed together with newly formed Congo Craton (North Central Africa) and made the Super Continent "Pannotia", which broke up with it self and made the continents of today.

**//__Rocks/Landforms__//**

<span style="color: #000000; font-family: 'Comic Sans MS',cursive;"> One of the hardest topics to discuss because apparently <range type="comment" id="690375">no one has found rocks from t<span style="font-family: 'Comic Sans MS',cursive;">he Precambrian time, only rock such as moon rocks or meteorites can possibly be that old. The first Precambrian continents had surfaces of igneous rocks which adds to our topic but we need more. Geologists date the beginning of the Proterozoic Era, by the age of the oldest continental rocks.

__**//<span style="color: #000000; font-family: 'Comic Sans MS',cursive;">Where is Massachusetts located? //**__

UNDERWATER !! However a little after, sandstones, limestones and shales were deposited on top of the Precambrian deposits as North America was continually covered by shallow seas or received sediments from higher ground. North America was in the center of Rodinia.

<span style="color: #a81010; font-family: 'Comic Sans MS',cursive;"> In the <span style="color: #a81010; font-family: 'Comic Sans MS',cursive; font-size: 130%;">Hadean Era "Hades-like" everything was boiling with lava and meteors were showering in every direction (they call it Hadean for a reason; it was like the underworld came out into the outer world.) Some scientists believe that an asteroid as big as Mars smashed into Earth and thus made our moon. <span style="font-family: 'Comic Sans MS',cursive;"> <span style="color: #1826b9; font-family: 'Comic Sans MS',cursive;">In the <span style="color: #1826b9; font-family: 'Comic Sans MS',cursive; font-size: 130%;">Archaean Era "Ancient" a great deal of water vapor that was in the air chilled and condensed to form a global ocean. This period was full of dust, <range type="comment" id="896043">crud, CO2, water vapor and even some nitrogen and also some stinky sulfur compounds. The precious but deadly CO2 was chemically changed into limestone, which then made its way to the bottom of the ocean. <range type="comment" id="969336">The lava finally decided to take a chill pill and by doing so the ocean floor was made, however the center of Earth is yet very hot. The volcanoes were kind enough to make small islands, which was the only land surface. <span style="color: #1826b9; font-family: 'Comic Sans MS',cursive;"><range type="comment" id="786112">Their appeared to be a movement of rock deep in the Earth’s surface that carried the islands over the surface of the Earth, we call this Plate Tectonics. The Plate Tectonics has been shifting land for as long as we animals can recall. Smaller Islands smacked into each other to make <range type="comment" id="987233">longer islands and those <range type="comment" id="164779">longer islands produced the core of the continents. <span style="color: #0c29ac; font-family: 'Comic Sans MS',cursive;"><range type="comment" id="930372">One more thing and then we subside to the next topic. Layer and layer of sediments were piled one onto another, they were combined and later on made something we call sedimentary rock. T<range type="comment" id="98412">hose layers are like Trident layer, expect we don’t call them Trident layers we call them Stratum. <span style="font-family: 'Comic Sans MS',cursive;"> <span style="color: #155120; font-family: 'Comic Sans MS',cursive;">In the <span style="color: #155120; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Proterozoic Era "Early life" the sure to last continents came and took their places. They grew large, but it took a few billion years for them settle. Also <range type="comment" id="767058">theres ridiculous amounts of fossils of living organisms, mostly archaea and bacteria or if we want to say it in a family term, our ancestors. Approximately 1.8 billion years ago, eukaruotic cells emerge as fossils too. Toward the end of the Proterozoic Era we witness the first animals, which came from the explosion of eukaryotic forms. Picture this, two super continents, one that you can see across the equator on one side of Earth and another that's chilling on the other side. These super continets are huge masses of land formed by the hurtful collisions of the abundant islands created by the volcanoes in the Archean and most of the Proterozoic Eras. <range type="comment" id="663621">After some time, all of the hot volcanoes started to fade away, all because the Earth finally cooled down. <span style="color: #155120; font-family: 'Comic Sans MS',cursive;"> In order to date the beginning of the Proterozoic Era, geologists use the information that the oldest continental rocks that haven't been chemically altered or reheated can give. Insanely cold and colossal bluish glacial ice sheets were perceivable from across the super continents, even in regions were it's usually pretty darn hot. Glaciers had invaded Michigan in this time, we call this glaciation the Gondwana glaciation. <span style="color: #155120; font-family: 'Comic Sans MS',cursive;">

<span style="color: #fa7700; font-family: 'Comic Sans MS',cursive;">**//__Life on Earth__//**

<span style="color: #db8929; font-family: 'Comic Sans MS',cursive;"> This is what Merriam-Webster dictionary defines “life” as, “//the quality that distinguishes a vital and functional being from a dead body.//” So even though the kind of life that was alive back in the Precambrian time looks a little odd for a common person’s eyes, this still is life. The remains of different types of bacteria are in archean rocks about 3.5 billion years ago (No life in the Precambrian continents.) 1.7 billion years ago single celled creatures appear that had a real nucleus. Nowadays oxygen combines with iron and other elements to make awesome mineral deposits around Earth, but you see the oxygen we all love and adore today was poisonous to most of the life forms living on Earth in the Precambrian time. If there weren’<span style="color: #db8929; font-family: 'Comic Sans MS',cursive;">t any fossils we would probably have no idea that these fellows ever existed, so thank you preserved remains or traces of past life. (Fossils) <span style="color: #db8929; font-family: 'Comic Sans MS',cursive;">It’s a rare thing-fossilization- it only occurs when conditions are just right and you have a better chance to find the actual fossils in the sea than in dry land-. <span style="color: #db8929; font-family: 'Comic Sans MS',cursive;"> Some of the life that existed in the Precambrian time and that thanks to the fossils were able to know about them are the stromatolites, which got around in the late Archean Period and continued to increase through most of the Precambrian time. The Hadrophycus immanus were in the same period as the stromatolites. Pteridinium Carolinaensis assume they were also in the Archean Period, but there is no actual information about them. <range type="comment" id="8059">(I can tell you though that they found it in situ in glauconitic sandstone of the White Sea coast.) There was also some cells that <span style="color: #db8929; font-family: 'Comic Sans MS',cursive;">Hard to imagine everything evolved from these invertebrates, but one thing has to come from another.

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<span style="font-family: 'Comic Sans MS',cursive;"> Who wants to know some fun facts about the Precambrian Time?

<span style="font-family: 'Comic Sans MS',cursive;"> No ancient rocks are found at the Earth's surface in the North East.

<span style="font-family: 'Comic Sans MS',cursive;">Ancient rocks are found exposed at the surface in many parts of Canada.

<span style="font-family: 'Comic Sans MS',cursive;">Precambrian shield- Stable continental landmass

<span style="font-family: 'Comic Sans MS',cursive;">4.4 Billion years ago, asteroid as big as Mars strikes Earth and creates the moon by collision.

<span style="font-family: 'Comic Sans MS',cursive;">Pre in Precambrian is obviously before Cambrian but what does Cambrian mean? <span style="font-family: 'Comic Sans MS',cursive;">The name Cambrian was coined by the Roman name for Wales, where rocks of this date were first found.


 * //<span style="font-family: 'Comic Sans MS',cursive;">How Fossilization works... //**

//__**<span style="font-family: 'Comic Sans MS',cursive;">@Bibliography **__//

<span style="color: #3a0250; font-family: 'Comic Sans MS',cursive;">//__**Reflection **__//