Detecting a periodic signal in the terrestrial cratering recordA time-series analysis of model periodic data, where the period and phase are known, has been performed in order to investigate whether a significant period can be detected consistently from a mix of random and periodic impacts. Special attention is given to the effect of age uncertainties and random ages in the detection of a periodic signal. An equivalent analysis is performed with observed data on crater ages and compared with the model data, and the effects of the temporal distribution of crater ages on the results from the time-series analysis are studied. Evidence for a consistent 30-m.y. period is found to be weak.
Document ID
19890023507
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Grieve, Richard A. F. (Geological Survey of Canada Ottawa Ontario, Canada)
Rupert, James D. (Geological Survey of Canada Ottawa Ontario, Canada)
Goodacre, Alan K. (Geological Survey of Canada Ottawa, United States)
Sharpton, Virgil L. (Lunar and Planetary Institute Houston, TX, United States)