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Virtually every book on paleontology includes a picture or table on the geologic time scale of some sort. But have you ever noticed that virtually none of them is drawn in true proportions? As a result, many of us have no good, from the top of the head insight in the true propotions of the geologic periods and epochs. Who truly realizes that the Cretaceous for example, represents a larger time span than the whole of the Cenozoic? In any case, for a long time I did not, and the drawings I devoured as a kid did not really help me to grasp the true dimensions of each of the geological periods. Obviously, drawing such a chart poses quite some challenges in terms of layout. In 2015, admittedly a bit frustrated by the lack of such diagrams in literature (I might simply overlooked them), I made a first effort to overcome these challenges and draw a truly proportional infographic of the geologic timeline. It was published in a simplified form in a Belgian book on local geology. Still I kept finetuning it and adding some basic information and then it was resting on a digital shelf for over a year. Today I decided that was rather pointless, so I translated the infographic to English and shared it under the creative commons license for all to use: https://commons.wikimedia.org/wiki/File:Geologic_Time_Scale.png I hope it can be useful for educators. Feel free to provide me with feedback so I can further improve it. From the moment I'm completely satisfied with the infographic, I plan on releasing the original layered vector file, so everyone can use, edit, adapt and reshare the work in complete freedom.
Lost pdf chart I found onlune when I got new phone and cant find it online. It listed tx counties, areas and types of finds to be found there. Anyone know what I am talking about and can lead me to page to download again. On road trip and wish I had it!