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    Vidal91's Avatar
    Vidal91 Posts: 2, Reputation: 1
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    #1

    Nov 4, 2014, 10:40 AM
    Essay Question, Really Need Help...
    Discuss how evidence from the world's oceans has been used to identify rapid environmental change at the end of the last glacial period?

    Can someone also explain what it means when dextral N. pachyderma increases and sinistral N. pachyderma decreases? Is it oceans warming, or freezing of ice?
    Curlyben's Avatar
    Curlyben Posts: 18,468, Reputation: 1857
    Admin & Wine Expert
     
    #2

    Nov 4, 2014, 10:51 AM
    What do YOU think ?
    While we're happy to HELP we wont do all the work for you.
    Show us what you have done and where you are having problems..
    CravenMorhead's Avatar
    CravenMorhead Posts: 4,532, Reputation: 1065
    Adult Sexuality Expert
     
    #3

    Nov 4, 2014, 10:51 AM
    Take a look at [this]. Sinistral seem to prefer lower temperatures. The Dextral variant seems to prefer warmer temperatures. So when the Dextral levels increase and the Sinistral decrease, that will imply that the water is getting warmer.
    Vidal91's Avatar
    Vidal91 Posts: 2, Reputation: 1
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    #4

    Nov 4, 2014, 11:23 AM
    So I've found a journal which shows the variation in the two over the past 15ka bp but sinistal seems to stay high and dextral remain low up until present day but I cant workout why? Surely sinistral should decrease and dextral increase?

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