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Origin & Development of Life Visual

500 505 510 438 SIU 400 e Caledonian orngeny undtaant 600 375. 630 Pan-Atican.orogeny ntgess inseca fgreet divorsfication of oin the s00 357 cambrian Ordovician 340- shphibia Siurian 2000 ertinclion 1800 1900 2200 630 438 1700- -680 Devonian lastmajorjdevglepinytl of barded ipn fomanidris 180n. 1600- Bao4ome commoN opening of lapetus ocaan 305, 1500- 360 F00 300- 2150 1400 testm.co .ovisms 206 Gindwansnd Qacalions 750 lo well devopped multi-collda organisms 1300 - edacaran (sobed) hunas romatites 286 Teclorogene 800 1200 2500 possiblo onsol age of oldest rocks Amitsog ghoisses of a sodmert of plato tectonCS Pargaos supercontinent Best siromatoln te Orgin of mass extinction -248 248 100 W. Groenland, toua sodimento) mass eatinction 3600 33ob 3800 1959 4000 -2600, 3500 213 aldest shell corbonaten evoporitos oldost Rod bods Scourian orogony 3400 2700 3300 2800 dinosurs 3200 4100 215 213 Ons Tomsurcto opening of CAantc 3100 3000 4400 44 MEZOZOIC --tan 180 intense bombordmont of planetary surfaces (4500-4000 Ma) manmls T4200 205- Irst micro-organiomy bacleria & begroori algao 4300 opening of NAltic 200- 4600 age of Earh Moon and meteorites 4500 coro-mantie separation? CENOZOIC Cret a/c e OUS 144 135 TERTIARY mass extinetion operng of SAstantic has 144 20 10 owring plants Left A section through the Earth's atmosphere from the surface to the edge of inter-planetary space. 120 100 THE ORIGIN AND DEVELOPMENT OF LIFE Primitive life-forms (blue-green algae) are found in rocks as old as 3500Ma (million years) and, although it eannot yet be proved, the origin of life on Earth probably dates back to about 4000Ma. It seems likely that the oxygen levels in the atmosphere in- creased only slowly at first, probably to about 1% of the present amount by 2000M.. As the atmospherie oxygen built up so the protective ozone layer developed to allow organisms to live in shallower waters. More highly developed photosynthesising organ- isms led to the development of oxygen breathing animals. The first traces of mul- ticellular life oceur about 1000Ma; by 700M. complex animals such as jellyfish, worms and primitive molluses, had developed. The Precambrian-Cambrian boundary re- reptiles and the first mammals. These ex- cords the time when organisms developed panied hugely at the beginning of the hard parts that allowed their preservation as abundant fossils. This coincided with a period of explosive evolution of marine life. of plant and animal species died out. Earth Fishes appeared in the Ordovician and by scientists have long sought explanations but the late Silurian land plants had developed. only recently evidenee emerged that this In the Carboniferous dense vegetation co- vered the land, amphibians emerged from meteorites or asteroids. 60 55 Alpine-Himalayan krogeny Maellion years first appearance massextlection of land ite mass extlectlon of marine life glaclatien mllions of years ago the sea, and by the Triassie had given rise to Mass extinctions have struck all kinds of marine life over the past 700 million years, from single-cell algae and plankton to huge swimming reptilles and whales. At the end of the Cretaceous period 65 million years ago most marine species became extinct. At about the same time the dinosaurs became extinct on land. In some cases an animal or plant group has been able to recover after a crisis and evolve a new species: in other cases the entire group has vanlshed. Cenozoie. The fossil record shows that throughout the Phanerozoie large numbers may be the result of impacts of comets, Jurasoie odied orga mass estiction on of dingaurs. Palaeocene grima mates Grasses Epcene Oligocent Miocene

Origin & Development of Life Visual

shared by rmmojado on Jan 27
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Awesome, so much detail, land water, geological time, such subtle pastel colours, little line illustrations & sharp pink sectioning. Brilliant, cheers steve.

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