| 释义 |
Illinoian, n. and a.|ɪlɪˈnɔɪən|
[f. Illinois + -an.]
A. n. A native or inhabitant of the state of Illinois.
The more usual form is Illinoisan.
1835C. F. Hoffman Winter in West II. 246 The Yankees..call us old Illinoians ‘Suckers’. 1867A. D. Richardson Beyond Mississippi xi. 132 Most readers have heard Ohioans spoken of as ‘Buckeyes’,..Illinoians as ‘Suckers’.
B. adj. Geol. Of, pertaining to, or designating the third Pleistocene glaciation in North America, now generally identified with the Riss glaciation in the Alps. Also absol., the Illinoian glaciation or the deposits it produced.
1896T. C. Chamberlin in Jrnl. Geol. IV. 875 While returning from my last visit to the field in which the Kansan, Illinoian, Iowan, and Wisconsin formations were seen in close succession, I made a memorandum of impressions respecting their relative ages. 1899Bull. Geol. Soc. Amer. X. 116 The color of the Illinoian till, where fresh and unweathered, is quite like that of the Iowan, and the boulders are somewhat similar... Judging by the changes that had been wrought in the surface of the Illinoian before the loess was laid down on it, this sheet of till is at least 5 or 6 times as old as the Iowan. 1934R. A. Daly Changing World of Ice Age i. 29 In the Middle West of North America, five Glacial stages have been proved, and named, from oldest to youngest, the Nebraskan, Kansan, Illinoian, Iowan, and Wisconsin stages... However, the Iowan glaciation may have been merely a phase of the Wisconsin. 1957J. K. Charlesworth Quaternary Era I. xxiii. 466 Lakes were impounded by Illinoian ice in Pennsylvania and Illinois on the older drift and for a short time in Iowa..on the Illinoian drift by the displacement of the Mississippi. Ibid. II. l. 1528 F. Leverett..estimates post Early Wisconsin time as 70,000 years and obtains c. 200,000 years since the Illinoian, more than 500,000 years since the Kansan, and probably one million years since the Nebraskan. 1970B. Mears Changing Earth xv. 384/1 A eustatic fall of 500 feet, more or less, seems likely for the Illinoian stage. |