The production and preservation of trilobite resting and furrowing traces
作者:
T. PETER CRIMES,
期刊:
Lethaia
(WILEY Available online 1975)
卷期:
Volume 8,
issue 1
页码: 35-48
ISSN:0024-1164
年代: 1975
DOI:10.1111/j.1502-3931.1975.tb00914.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
The production and preservation of trilobite resting and furrowing traces is discussed with special reference to specimens from Upper Cambrian strata in North Walcs, Spain, and Poland. Resting excavations are attributed largely or completely to animal activity, and do not normally rcsult from currcnt scouring. Resting excavations, furrows, and many other trace fossils are formed at the sediment‐water interface and not bencath a thin sand layer or by burrowing between beds. The factors which allow the initial production of the traces on the ocean floor muds (e.g. cohesion, shear strength, low pore water pressures) will also favour their preservation during deposition of the casting san
点击下载:
PDF
(2945KB)
返 回