Cambrian
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Transcript of Cambrian
![Page 1: Cambrian](https://reader033.fdocuments.in/reader033/viewer/2022060116/55823267d8b42a0d368b4676/html5/thumbnails/1.jpg)
MILLIONS YEARS AGO
![Page 2: Cambrian](https://reader033.fdocuments.in/reader033/viewer/2022060116/55823267d8b42a0d368b4676/html5/thumbnails/2.jpg)
THE EARTH DIDN'T LOOK AS TODAY
![Page 3: Cambrian](https://reader033.fdocuments.in/reader033/viewer/2022060116/55823267d8b42a0d368b4676/html5/thumbnails/3.jpg)
TERRIBLE STORMS, VOLCANIC EXPLOSSIONS, METEOR IMPACTS HURT EARTH
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After millions years of volcanic eruptionsAfter millions years of volcanic eruptions
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While the lava was changing the earth's face
![Page 6: Cambrian](https://reader033.fdocuments.in/reader033/viewer/2022060116/55823267d8b42a0d368b4676/html5/thumbnails/6.jpg)
... and huge steam clouds was covering the sky... and huge steam clouds was covering the sky
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ON THE OCEAN FLOORON THE OCEAN FLOOR
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IN SMALL PONDS...IN SMALL PONDS...
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LIFE WAS LIFE WAS BORNING BORNING !!
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STROMATOLITES ARE THE FIRST FOSSIL THAT AGESTROMATOLITES ARE THE FIRST FOSSIL THAT AGE
Stromatolites are commonly thought to have been formed by cementation Stromatolites are commonly thought to have been formed by cementation of sedimentary grains by microorganisms, especially cyanobacteria of sedimentary grains by microorganisms, especially cyanobacteria
(formerly known as blue-green algae)(formerly known as blue-green algae) Shark Bay (Australia)Shark Bay (Australia)
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570 MILLIONS YEARS AGO
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The Ediacaran fauna are ancient lifeforms, of the Ediacaran Period, that represent the earliest known complex multicellular organisms.
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Trilobite precursor
Coralprecursor Jellyfish precursor
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But, a rough ice age fell on EarthBut, a rough ice age fell on Earth
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Many millions years after, life was coming back to born
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540 MILLIONS YEARS AGO
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EARTH HAS OTHER CONTINENT GRUPSEARTH HAS OTHER CONTINENT GRUPS
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AND VERY STRANGE ANIMALS LIVED IN THE SEA
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THE CAMBRIAN EXPLOSIONDESCRIBESTHE MAJOR
DIVERSIFICATION OF ORGANISMS.
IT IS A CHALlENGE TO
EVOLUTION
![Page 20: Cambrian](https://reader033.fdocuments.in/reader033/viewer/2022060116/55823267d8b42a0d368b4676/html5/thumbnails/20.jpg)
DURING THE CAMBRIAN A LOT OF LIFE MODELS WAS TRYING, BUT SOME OFF THEM VANISH OF THE FACE EARTH
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ANOMALOCARIS: ARTHROPODA. IT WAS A GIGANTIC CREATURE, NEARBY 2 METER.
THE BIGGEST PREDATOR BY THE AGE
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HALLUCIGENIA. ONICOPHORAN?ITS NAME IS AS ITS BODY, A HALLUCINATION
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OPABINIA. IT LIVED ON TOP OF THE SOFT SEDIMENT ON THE
SEABED
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PIKAIA. CHORDATE. PERHAPS IT IS THE OLDEST KNOWN ANCESTOR OF MODERN VERTEBRATES, INCLUDED THE HUMANS
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MARELLA. ARTHROPODAIT FED ON ORGANIC PARTICLES
AND IT WAS CAPABLE OF WALKING AND SWIMMING
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WIWAXIA: MOLLUSK OR ANELID ?WIWAXIA: MOLLUSK OR ANELID ?
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PERSPICARIS WAS A PERSPICARIS WAS A STRENGE BIVALVED STRENGE BIVALVED ARTHROPODARTHROPOD
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AYSHEAIA AYSHEAIA ONICOPHORA. ONICOPHORA. VELVET WARMVELVET WARM
IT LIVED IT LIVED WITHIN WITHIN
SPONGE SPONGE COLONIES AND COLONIES AND
MAY HAVE MAY HAVE PROTECTED PROTECTED ITSELF FROM ITSELF FROM PREDATORSPREDATORS
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HAPLOPHRENTIS. MOLLUSK? THEY ARE ENIGMATIC ANIMALS WITH SMALL CONICAL SHELLS. THEY ARE CARNIVORES
![Page 30: Cambrian](https://reader033.fdocuments.in/reader033/viewer/2022060116/55823267d8b42a0d368b4676/html5/thumbnails/30.jpg)
NECTORASIS
VUAXIA
POLYCHAETEWORM
PIRANIA
OLENELLUS
DYCTIOPHICUS
CRINOIDEUSBURGESSIA
BRANCHIOCHARIS
BRACHIOPODOS
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Burgess Shale FossilsBurgess Shale Fossils
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500 MILLIONS YEARS AGO
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THE LIFE WENT OUT THE THE LIFE WENT OUT THE WATER FOR CONQUER EARTHWATER FOR CONQUER EARTH
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TO BE CONTINUED ...