We present a mathematical model for coastal submarine placer (CSP) generation under lateral coastal drift conditions. We test the model against field data and propose a method of predicting CSP parameters which has possible economic application for locating placer deposits. The model provides a method to estimate the time and rate of CSP formation. The model yields an age for a tin-bearing sediment in northeastern Siberia to be less than 40,000 years. This estimate is approximately 1000 times less than age given by the standard evolutionary geology time scale. A logical extension of this work is to two and three dimensions. This would make possible more detailed comparison of the models with field data and produce improved methods for estimating placer parameters.