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Took this photo of an unnamed eschrichtiid from the Pliocene San Diego Formation of San Diego County in March 2019. Until the 2000s, the fossil record of gray whales was confined to the Pleistocene, but thanks to the work of Michelangelo Bisconti, it is apparent that gray whales emerged about the same time as the oldest rorquals (Eschrichtioides was long considered a balaenopterid, but eventually recognized as a gray whale relative).
Humans in California 130,000 years ago? Bold study says it's possible Humans in California 130,000 years ago? Bold study says it's possible, CBS News, April 26, 2017 http://www.cbsnews.com/news/humans-in-california-130000-years-ago-bold-study-says-its-possible/ Holen, S. R., T. A. Deméré, and others, 2017, A 130,000- year-old archaeological site in southern California, USA Nature 544, 479–483 (27 April 2017) doi:10.1038/nature2206 https://www.nature.com/nature/journal/v544/n7651/full/nature22065.html Yours, Paul H.
Greetings, My lying eyes are struggling with the unlikely chance that the forms in this rock are biological in origin. This looks like coral to me: I see rough impressions of corallites, polyp anatomy, septa, hexagonal and circular chambers, and signs of stacked chambers where masses are sheared perpendicular to the exterior surfaces. The average diameter of the corallite-like openings is ~.5 cm. Many are smaller. Some are up to 2 cm. Note the manner in which various tilted tubes erode to reveal their lengths and interiors; and the presence of angle-cornered walls that group fiel