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It thus seems reasonable to say we are entering another Ice Age according to Milankovitch cycles. Some of the Milankovitch conditions would appear to make the Earth ripe for a new glacial epoch starting now, or perhaps a few hundred years ago. In particular, aphelion occurs in early July, and obliquity is low. Both of these make for mild northern hemisphere ...

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No, we are not due for a new glaciation (not "Ice Age", we are in an ice age) from orbital forcing alone. Citing Ganopolski et. al. Critical insolation–CO2 relation for diagnosing past and future glacial inception Additionally, our analysis suggests that even in the absence of human perturbations no substantial build-up of ice sheets would occur ...

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In its 1995 assessment of total world oil supplies, the U.S. Geological Survey (USGS) estimated that about 3 trillion barrels of recoverable oil originally existed on Earth and that about 710 billion barrels of that amount had been consumed by 1995. Britannica There may be much larger quantities that are not "recoverable", depending on technology ...

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Just to give some complementary informations from the other answer: the base of the Fortunian is indeed defined in eastern Canada on the basis of a trace fossil (which obviously cannot be itself dated since it is just an imprint), Trichophycus pedum. This trace fossil however being spread worldwide help correlating various sections throughout the world. One ...

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