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Thread: Question About Ancient African Forests That Once Inhabited The Savannahs?

  1. #1 Question About Ancient African Forests That Once Inhabited The Savannahs? 
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    I'm hoping someone(s) can answer this for me as this has me puzzled and so here goes ... and that is when the forests of eastern africa started to disappear some 4 to 6 million years ago to which brought about the savannah grasslands that eventually spawned our first upright ape ancestors (Sahelanthropus, Australopithecines etc.) what eventually became of all those thick forests and their hard bark and roots? I'm assuming that they eventually either rotted away or became fossilized? If they did rot away approximately how many years would that take? Could there possibly be fossilized roots/bark of them still buried and/or lying around in the savannahs today? So in other words ... just how do biologists/paleontologists know that there was once extensive ancient forests/jungles throughout the current grasslands of eastern africa today?

    Thanks!

    Jesse


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  3. #2  
    ▼▼ dn ʎɐʍ sıɥʇ ▼▼ RedPanda's Avatar
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    A partial answer:

    How long before a tree rots away? | ScienceNordic

    It can take 200 to 300 years for a downed pine tree to disappear, but most of a spruce will be gone within 50 to 100 years, says Olav Hjeljord.

    Hes a professor emeritus at Department of Ecology and Natural Resource Management at the Norwegian University of Life Sciences.
    Although that isn't all types of tree, it gives a 'ball park' figure.


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    Malignant Pimple shlunka's Avatar
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    I imagine that they can determine the preexisting forests by observing the chemical composition of the soil?
    "MODERATOR NOTE : We don't entertain trolls here, not even in the trash can. Banned." -Markus Hanke
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  5. #4  
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    O.k. great as i really appreciate both answers as that really helps !!

    Jesse
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  6. #5  
    Malignant Pimple shlunka's Avatar
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    The trees probably just ran off somewhere.
    "MODERATOR NOTE : We don't entertain trolls here, not even in the trash can. Banned." -Markus Hanke
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  7. #6  
    Forum Freshman overthelight's Avatar
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    I think, human in the ancient era couldn't take enough foods. Then, human in the ancient couldn't have well-working-body and brain than we're having now.

    The body which wouldn't work well couldn't make enough body temperature in the ancient era. Lower body temperature can heat the air temperature as lower. The temperature in Africa wouldn't be high than in the Ocean in the ancient era.

    BTW, lower temperature can make atmospheric low pressure, because the air will shrink when getting lower temperature. Therefore, the weather of Africa in the ancient era could get enough rain by the temperature. I think it's the reason of that Africa and Middle East in ancient era had glass in the center.

    Now people and industries and PCs and cars and more are working on the ground. Then, temperature on the field will get higher and higher than ocean in the future. Great amount of water will be lost on the ground in the future.
    For getting enough water on the ground, by a man, just get the water in a bottle. the water in the bottle will make the rain after making off.
    Science gives people the hope always.
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  8. #7  
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    You are over-estimating the amount of heat humans put off.
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    Quote Originally Posted by PhDemon View Post
    That's the least of his problems...
    Most of it, I could decipher.
    It's an assumption, true. And wrong. But... that can be addressed.
    "For getting enough water on the ground, by a man, just get the water in a bottle. the water in the bottle will make the rain after making off."
    I haven't the foggiest what this says.
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