THE OCCURRENCE OF THE BLUE-GREEN ALGA Girvanella IN THE LOWER ORDOVICIAN OF PRECORDILLERAN ARGENTINA
نویسنده
چکیده
The occurrence of the blue-green alga Girvanella, reported for the first time in the Ordovician rocks of South America (Precordilleran Ar gentina), allows the completion of the pattern of horizontal distribution of this organism in relation to the palaeobiogeography of the Lower Ordovi cian.
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