Gradual shifting of the spectral bands indicates the gradual changes of frequency, which reflects the gradual changes of net depositional rate.
滑动窗能谱带的逐渐转移，表示频率的逐渐变化，反映净沉积速率的逐渐变化。
Gradual shifting of the spectral band toward high-frequency presents upward thickening succession, which means the upward net depositional rate decrease.
能谱带逐渐向高频方向转移，反映一个向上变薄的序列，即向上净沉积速率减小。
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