“orbitoidal”的英文意思

单词

orbitoidal

释义

orbitoidal, a. Geol.|ɔːbɪˈtɔɪdəl|
[f. as prec. + -al¹.]
Applied to (N. American) limestones containing shells of the genus Orbitoides.
1850Lyell 2nd Visit U.S. II. 91 The bluff was..formed of an aggregate of corals..called by A. D'Orbigny orbitoides. I had seen the same ‘orbitoidal’ limestone in the interior of Clarke county.1876Page Adv. Text-bk. Geol. xix. 363 The nummulitic and orbitoidal limestones, mainly composed of coin-shaped and globular foraminiferal shields, are undoubtedly the most important of tertiary strata.

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