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| − | Have not edited here before, but the explanation given is missing that Munroe is likely using the strict geological definition of age -- the smallest and most numerous standard division of geologic time, and which frequently varies between regions and are indeed essentially impossible to memorize worldwide, even for specialists. (The examples of the Devonian and Permian given in the current explanation are periods, a division of time that is much longer, of which there are many fewer, and which most geologists would have memorized.) This global timescale from the International Commission on Stratigraphy lists the global standard ages on the far right of each column: http://www.stratigraphy.org/ICSchart/ChronostratChart2016-12.jpg This chart, also from the ICS, lists different national conventions of ages in the Ordovician period alone, and gives a good sense of the kinds of names used: http://www.stratigraphy.org/upload/OrdChartHigh.jpg A couple of dog breeds in there would probably not be noticed.
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| − | Again, haven't edited here before, unsure if I should just go ahead and edit, or wait for discussion.
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| − | [[Special:Contributions/108.162.246.227|108.162.246.227]] 21:17, 26 April 2017 (UTC)
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| | This might help explaining: | | This might help explaining: |
| | https://en.wikipedia.org/wiki/List_of_tectonic_plates | | https://en.wikipedia.org/wiki/List_of_tectonic_plates |
