The 366 daily episodes in 2014 were chronological snapshots of earth history, beginning with the Precambrian in January and on to the Cenozoic in December. You can find them all in the index in the right sidebar. In 2015, the daily episodes for each month were assembled into monthly packages, and a few new episodes were posted. Now, the blog/podcast is on an occasional schedule with diverse topics, and the Facebook Page showcases photos on Mineral Monday and Fossil Friday. Thanks for your interest!

Tuesday, April 1, 2014

April 1. The Silurian begins



The Silurian was named in 1835 by Roderick Murchison, who took the name from the Silures, an ancient Celtic tribe of south Wales. The Silures began fighting the invading Romans about 48 AD. Their guerilla war was successful for something like 30 years, and it wasn’t until about 78 AD that the Silures were incorporated into Roman Britain. It’s not clear whether they eventually just acquiesced or were conquered in a military campaign.

The oldest sedimentary rocks of Britain, called the Primitive Series, were subdivided into the Cambrian and Silurian by Adam Sedgwick and Roderick Murchison, respectively. We talked in late February about the controversy those two friends became embroiled in over which rocks were in which period, a 40-year-long argument that was finally settled by the establishment of the Ordovician Period, also named for a Welsh tribe.
—Richard I. Gibson

Map from Wikipedia, used under GNU free documentation license

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