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strata_08 (brief summary)

screenman on 24. Mar, 2011 — Lang: English

strata_08 (brief summary)
  • This strip is a reply to strata_09 (brief summary)

    Transcript

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    If one year had become for a second, 147 years had passed since inception of the word.

    If 4,5 billion years had become like one day, .......

    00:00

    Inception. The gravitational pull of the new Moon stabilises the Earth's fluctuating axis of rotation and sets up the conditions in which life formed. The surface of the Earth cools enough for the crust to solidify. The atmosphere and the oceans form.

    03:40

    Lifetime of the last universal ancestor; the split between bacteria and archaea occurs.

    04:42

    Bacteria develop primitive forms of photosynthesis which at first do not produce oxygen.

    06:47

    Photosynthesizing cyanobacteria evolve; they use water as a reducing agent, thereby producing oxygen as waste product. The oxygen initially oxidizes dissolved iron in the oceans, creating iron ore. The oxygen concentration in the atmosphere slowly rises, acting as a poison for many bacteria.

    08:52

    Oxygenic photosynthesis first evolved in this era.

    10:26

    This is when the continents first stabilized. This is also when cyanobacteria evolved, a type of bacteria which uses the biochemical process of photosynthesis to produce energy and oxygen.

    15:08

    Sexual reproduction first appears, increasing the rate of evolution. Simple multicellular organisms evolve, mostly consisting of cell colonies of limited complexity.

    18:16

    A global glaciation may have occurred. Opinion is divided on whether it increased or decreased biodiversity or the rate of evolution.

    21:06

    Most modern phyla of animals begin to appear in the fossil record during the Cambrian explosion. Major diversification of living things in the oceans: chordates, arthropods (e.g. trilobites, crustaceans), echinoderms, mollusks, brachiopods, foraminifers and radiolarians.

    21:23

    First vertebrates with true bones (jawless fishes). Land arthropod burrows (millipedes) appear, along with the first complete conodonts and echinoids.

    21:37

    The first primitive plants move onto land,having evolved from green algae living along the edges of lakes. They are accompanied by fungi, which may have aided the colonization of land through symbiosis.

    21:45

    First signs of teeth in fish. First lichens, stoneworts. Earliest harvestman, mites, hexapods and ammonoids. The first known tetrapod tracks on land.
    By the start of the Carboniferous Period, the Earth begins to be recognisable.

    04:42

    First crabs and ferns. Land flora dominated by seed ferns. First large sharks. Diversification of amphibians. First amniote vertebrates (Paleothyris). Earliest reptiles.

    22:03

    Earliest beetles, seed plants and conifers diversify while lepidodendrids and sphenopsids decrease. Terrestrial temnospondyl amphibians and pelycosaurs (e.g. Dimetrodon) diversify in species. The Permian-Triassic extinction event eliminates over 90-95% of marine species. Terrestrial organisms were not as seriously affected as the marine biota.

    22:21

    The Mesozoic Marine Revolution begins: increasingly well-adapted and diverse predators pressurise sessile marine groups; the "balance of power" in the oceans shifts dramatically as some groups of prey adapt more rapidly and effectively than others. Earliest dinosaurs (prosauropods), first cardiid bivalves, diversity in cycads, bennettitaleans, and conifers. First teleost fishes. Gymnosperm forests dominate the land; herbivores grow to huge sizes in order to accommodate the large guts necessary to digest the nutrient-poor plants. first flies and turtles (Odontochelys). First Coelophysoid dinosaurs. First mammals (e.g. Eozostrodon), minor vertebrate extinctions ocur.

    22:36

    coming soon: the last one and a half hours

    Tags:
    strata
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Comments

  • cackle 28.3.2011
    remind me High School years some boring lessons;))
  • Drachir 25.3.2011
    And for one second
    I wished that you were here
  • SnakeYukin 24.3.2011
    Man... things indeed would be going quite fast.
  • Maoriman 24.3.2011
    I'm just amazed you managed to get all that down with no mistakes...
  • sound 24.3.2011
    Waiting for to see what happened after 22:36...
  • rukowski 24.3.2011
    man you are really into this in a big way

Displaying 6 out of 6 comments.