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Fig. 3. | Earth, Planets and Space

Fig. 3.

From: Long period astronomical cycles from the Triassic to Jurassic bedded chert sequence (Inuyama, Japan); Geologic evidences for the chaotic behavior of solar planets

Fig. 3.

(a) Stratigraphic variations in the chert bed thickness and 50 point moving average of the chert bed thickness, and (b) Wavelet power spectrum and bandpass filter of a bed number series of chert bed thickness variations in upper Triassic to lower Jurassic bedded chert, and (c) a 405 kyr tuned chert bed thickness time series in upper Triassic to lower Jurassic chert beds in the Inuyama area, Central Japan. The cross-hatched region is the cone of influence, where zero padding has reduced the variance. Black contour is the 90% confidence level, using a red-noise (autoregressive lag1) background spectrum (Torrence and Compo, 1998). Radiolarian zones are based on Hori (1990, 1997), Sugiyama (1997) and Carter and Hori (2005).

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