Final answer:
A graywacke spending a long time in a depositional basin, being in a tectonically stable setting, well sorted, and present in a shallow-water environment (less than 200m) are characteristics of a shoreline environment.
Step-by-step explanation:
The statement is true. A graywacke spending a long time in a depositional basin, being in a tectonically stable setting, well sorted, and present in a shallow-water environment (less than 200m) are characteristics of a shoreline environment. Graywacke is a type of sandstone that is commonly found in such environments.