| 单词 |
Albertan |
| 释义 |
Albertan, a. Geol.|ælˈbɜːtən|
[f. the name of Alberta, a province of western Canada + -an.]
Of, pertaining to, or designating the Middle Cambrian in (esp. western) North America. Also absol. (See quot. 1982 and cf. Acadian a. 2 a.)
1921A. W. Grabau Textbk. Geol. II. xxxii. 243 The best developed sections so far known are in the Cordilleran trough of western America, where, in Alberta, Canada, a thickness of 8300 feet has been measured. [Note] The name Albertan has been proposed by the author for the Middle Cambrian of the Pacific Province. 1940― Rhythm of Ages ix. 101 The best known section is that of Mount Bosworth, in British Columbia, where the Taconian..is followed by 4,580 ft of Cambrian or Albertan. 1940Bull. Geol. Soc. Amer. LI. 732 Important unsolved stratigraphic problems in the Waucobian and Albertan rocks of British Columbia. 1957Dunbar & Rodgers Princ. Stratigr. xvii. 297 In some systems the individual series have geographic or other distinctive names (e.g., Waucoban, Albertan, and Croixian Series of the Cambrian of North America; Lias, Dogger, and Malm Series of the Jurassic of western Europe). 1982[see Acadian a. 2 a]. |
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