Simplify the following text for a Grade 4 native English-speaking person.
Original: Except on the west coast , where the white sandy beach is more extensive than elsewhere , a strip of dark gray coral rubble , forming a series of low ridges parallel to the coast , lies within the narrow beach , extending inward to the island rim .
Simplified: On the west coast , the white sandy beach is bigger . On the rest of the coast there is a strip of dark gray coral rubble , forming a ridge .