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'.
随便看	rangeful range gate range hood rangeland rangeless Rangeley Lakes range light range mark range marker range plate range-proof ranger range resolution Ranger Guide Ranger Guider range rider range ring rangership range safety crew range safety officer range stake range-taker rangette range war range work

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