| 单词 | lebensspur |
| 释义 | ‖ lebensspur|ˈleːbənsʃpuːr|
Also with capital initial. Usu. as pl. lebensspuren.
[a. G. lebensspur (O. Abel Grundzüge der Palaeobiol. der Wirbeltiere (1912) 65), f. leben life + spur trace, track, remains (cogn. w. spoor n.1).]
A small track, burrow, cast, or the like left in sediment by a living organism; esp. one preserved in fossil form in sedimentary rock.
1960Gloss. Geol. (Amer. Geol. Inst.) Suppl. 37/2 Lebensspur. 1962R. C. Moore Treat. Invertebr. Paleont. W. 178/2 Lebensspuren are very transient structures as compared with shells, skeletons, or other hard parts, and in general they have little chance of being preserved as fossils. Ibid. 179/2 Many fossils..which have now been identified as Lebensspuren, were considered to be remains of marine algae. 1964Pettijohn & Potter Atlas & Gloss. Primary Sedimentary Struct. Plate 70A (heading) Lebensspuren on underside of sandstone. 1973Nature 30 Mar. 323/2 In a recently completed series of laboratory studies, lebensspuren were produced by individual macrobenthic organisms on a variety of marine sand and mud substrates (freshly collected from..the Bristol Channel) from which all other macrofauna had been removed by passing it through a 1·0 mm mesh. But the resultant tracks, trails and burrows gradually disappeared when the aquarium tanks..were left undisturbed. |
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