Some Practical Aspects of Time Series Analysis
In many geologic applications, geologic observations in a strati-graphic succession correspond to changes taking place through time. Where deposition was continuous and the rate of deposition was relatively constant, stratigraphic thickness can be considered directly proportional to time. Therefore, time-trend curves can be plotted with stratigraphic thickness corresponding to time as the independent variable and the parameter being studied as the dependent variable. The dependent variables can include such things as grain size, carbonate content, color, or fossil distribution. In modern sedimentary studies where processes are being studied through time, absolute time can be plotted as the independent variable and the dependent variables can include such things as barometric pressure, wind velocity, wave height, or current velocity.
KeywordsWave Height Wave Period Barometric Pressure Sine Curve Longshore Current
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