Orthid


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Orthid

[′ȯr·thəd]
(geology)
A suborder of the soil order Aridisol, mostly well drained, gray or brownish-gray with little change from top to bottom of the soil profile; occupies younger, but not the youngest, land surfaces in deserts.
References in periodicals archive ?
The genus Leoniorthis differs from the Early and Middle Ordovician orthid brachiopods Paralenorthis, Orthambonites, Sulevorthis and Sivorthis (see Egerquist 2003) in the characters of radial ornament.