The periodic growth increments of biological shells and the orbital parameters of Earth-Moon system |
| |
| Authors: | Zhao Zhenyu Zhou Yaoqi Ji Guosheng |
| |
| Institution: | (1) Laboratory of Geochemistry & Lithosphere Dynamics, China University of Petroleum, Dongying, Shandong, 257061, China;(2) Resources and Information Institute, China University of Petroleum, Dongying, Shandong, 257062, China |
| |
| Abstract: | Periodic increments in the growth of organismal shells and fossils in the intertidal zone were studied by light microscopy,
scanning electron microscopy and chemical composition analyses. The results were used to calculate the orbital parameters
of the Earth-Moon system from the Ordovician to Quaternary period. The annual, semi-annual, biweekly (14-day), daily and subdaily
growth rhythms were identified on the surface of shells. The periodic changes in the growth increments of shells and the rhythmic
variations of microelements in fossils and organisms were reliable indicators of environmental changes. There were 415.69 days
for an annual period in Ordovician, 407.1 days in Devonian, 400.51 days in Carboniferous-Permian, 393.98 days in Tertiary,
374.13 days in Triassic and 367.4 days in Quaternary. The data collected and calculated from these growth increments show
that – from the Ordovician to the Quaternary period – the rate of Earth’s rotation has been slowing down and that the distance
from the Earth to the Moon has been increasing, while the rate of lunar retreat has been decreasing. |
| |
| Keywords: | Ordovician– Quaternary Rhythm of growth increments Orbital parameter of the Earth-Moon system |
| 本文献已被 SpringerLink 等数据库收录！ |
|
