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单词 spreite
释义

spreite

/ˈʃprʌɪtə /
noun (plural spreiten or spreites) Palaeontology
A banded pattern of uncertain origin found in the infill of the burrows of certain fossil invertebrates.In the latter two ichnotaxa, the vertical spreite in the distal part of the structure is generated by the retrusive, axial migration of an upper, upward bending J-shaped tube....
  • Planolites, Diplocraterion and vertical and inclined burrows with spreite are common.
  • Sheeted traces with curved spreite have been described as Heimdallia from mid-Palaeozoic coarse sandstone units in the Beacon Supergroup and the Tumblagooda Sandstone.

Origin

1960s: from German Spreite 'layer, lamina'.

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更新时间:2024/12/24 8:42:09