| 释义 |
nannofossil Geol.|ˈnænəʊfɒsɪl|
[f. as next + fossil a. and n.]
A fossil of a minute plankton organism.
1963H. Stradner in Proc. 6th World Petroleum Congr. I. 167/1 Nannofossils (minute calcareous elements of planktonic marine flagellates) were found in sediments younger than Triassic. Ibid., A key for the determination of nannofossil assemblages is given. 1971Nature 3 Sept. 46/1 The ophiolites in those deep-sea troughs were overlain by..radiolarian and nannofossil oozes. 1972Sci. Amer. Dec. 33/2 The white ooze is a typical oceanic sediment, made up almost entirely of the skeletons of microfossils and nannofossils. 1974Nature 13 Sept. 129/2 The chalk contains abundant nannofossils whose preservation is, unfortunately, somewhat marred by calcite overgrowths. |