Abstract
Aragonitic chlorophyte (green) algae, typical of the warm seas of the Tethyan area, reached as far north as the present Cotswolds of Southern England in mid‐Jurassic times, when conditions made colonisation possible. Few in numbers and species, they appear to show features similar to those of their living descendants found today in warm seas marginal to the tropics, so confirming the Jurassic palaeolatitude arrived at independently from palaeogeographical studies.
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