Calculated fossil yield data from Test Area. Each row represented an area of overlap between two years given as Early Year and Later Year. The Hiatus Length is the time between the two years and the Hiatus Class is the class used for statistical analysis. Early Year Collections is the number of field collections occurring in the overlap area for the early year and Later Year Collections is the number for the later year. YDOA and LYOA are calculated as explained in the methods.
Python code implemented in ArcMap to 1) Estimate prospecting area, 2) Locate overlap areas, and 3) Count number of field collection in an overlap area.