| 释义 |
‖ spreite Palæont.|ˈʃpraɪtə|
Also Spreite. Pl. spreiten.
[Ger., a layer of lamina, esp. something extending between two supports.]
A banded pattern of uncertain origin found in the infill of the burrows of certain fossil invertebrates.
1962W. Häntzschel in R. C. Moore Treat. Invertebrate Paleont. W. 182/2 The vast majority of trace fossils remain unchanged through the geologic eras. This is true for nondescript, smooth furrow-like crawling trails and cylindrical burrows, as well as for more distinctive U-shaped burrows with Spreite. Ibid. 200/1 Gyrophyllites.., vertical shaft from which rosettes of short, simple (feeding) tunnels radiate at different levels, as in a mine; ‘leaves’ with sculpture of Spreiten burrows. 1976Nature 17 June 576/2 The burrow walls are laminated parallel to the long axis of the burrow, and the infill exhibits a cuspate (‘spreite’) structure.., probably indicating active backfilling by the animal responsible. |