|Field recording geometry|
Gravity is a strong force for the stratification of rocks, and many places in the world rocks are laid down in horizontal beds. Yet even in the most ideal environment the bedding is not mirror smooth; it has some texture. We begin with synthetic data that mimics the most ideal environment. Such an environment is almost certainly marine, where sedimentary deposition can be slow and uniform. The wave velocity will be taken to be constant, and all rays will reflect as from horizontally lying mirrors. Mathematically, texture is introduced by allowing the reflection coefficients of the beds to be laterally variable. The lateral variation is presumed to be a random function, though not necessarily with a white spectrum. Let us examine the appearance of the resulting field data.