Complex sentence: The site of the discovery was a wash at Cañadón de las Vacas, south-eastern Santa Cruz Province, Argentina, in Early-Middle Miocene (16.3--17.5 million-year-old) deposits of the fossiliferous Santa Cruz Formation.
Split into simpler sentences: The site of the discovery was a wash at Cañadón de las Vacas, south-eastern Santa Cruz Province, Argentina. It was found in Early-Middle Miocene (16.3--17.5 million-year-old) deposits of the fossiliferous Santa Cruz Formation.