| 释义 |
Bradford|ˈbrædfəd|
Shortened form of Bradford-on-Avon, the name of a town in Wiltshire, used attrib. in Bradford clay (see quots.). Hence Bradˈfordian a.
1858[see Bathonian a. 2]. 1903Geikie Textbk. Geol. (ed. 4) II. vi. 1142 Its [sc. Forest Marble's] lower portion near Bradford-on-Avon is a grey marly clay with thin layers of tough limestone and calcareous sandstone about 10 feet thick, and this argillaceous band has been separately designated the Bradford clay. 1910Encycl. Brit. IV. 372/1 Bradford clay, a thin, rather inconstant bed of clay or marl situated in England at the base of the Forest Marble, the two together constituting the Bradfordian group in the Bathonian series of Jurassic rocks. |