The plain is divided into a mainland in the west and a peninsula, known as East Shore, by Chesapeake Bay.
ເຂດທົ່ງພຽງທະເລແອດແລນຕິກແບ່ງອອກເປັນດິນແດນທາງທິດຕາເວັນຕົກແລະເປັນປາກກາ, ເຊິ່ງເອີ້ນວ່າ East Shore, ໂດຍ Chesapeake Bay.