sentences:  Scientists have discovered many layers of sand and peat under Neskowin Marsh indicating a long history of tsunami activity which carries sand from the coastal sand dunes.These might be the best record of tsunami activity within the Cascadia subduction zone.The refuge was established in 1991, and is located on Nestucca Bay at the confluence of the Nestucca and Little Nestucca rivers, ranging 3 to 5 miles (5 to 8 km) south of Pacific City.