Ochoan


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Ochoan

[ō′chō·ən]
(geology)
A North American provincial series that is uppermost in the Permian, lying above the Guadalupian and below the lower Triassic.
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ON the day women's professional golf finally came to the men-only St Andrews club, world number one Lorena Ochoan shot a six-under 67 to take a two-shot first round lead in the Ricoh Women's British Open.
A study by Rascoe & Barrs (1972) placed the Quartermaster, Alibates and Whitehorse in the Guadalupian Series, but more recent studies (McGillis & Presley 1981; Presley 1987) have placed the Alibates as a separate formation in the Ochoan Series.
Rare in the topmost Lamar but, according to Croft (1978), dominant in the basal Castile Formation at the very base of the Ochoan below the base of the hypersaline facies.