Not really. While the beach is composed of loose sand, it can not be called "rock" as such in a bulk sense. Each individual sand grain is a tiny rock in itself. If the beach becomes overlaid with other sediments, becomes compressed and all the grains fuse together over time, then it could be called "rock" (sandstone).
A sandy beach is an area on the ocean shore covered with sand. Some beaches are rocky or covered in seashell fragments.
Your description best fits a beach or coastline that is constantly changed by wave action.
P)
A wide bend in a coastline is called a bay. It is an indentation or curved area of land where the coastline curves inward, often forming a sheltered body of water. Bays can range in size from small coves to large, open bays.
That is called a peninsula.
A bight
it has a rocky and sandy coastline
rocky and sandy :) ;)
rocky
false
false
go there and find out
coast
Hurricane Sandy made its Northwest turn toward the coastline of the US at approximately 8:00 a.m. eastern time on Monday, October 29, 2012.
Polish beaches are sandy, yes, but they are not on the Black Sea. It's Baltic Sea.
The northeast coastline from Maine to New Jersey begins to get smoother the further south it goes. The coastline along Maine is mostly very rocky. The coastline of New Jersey is more sandy.
Translated coastline
the new york coastline