Ch 5. Tsunami Flashcards
(3 cards)
Describe the events that took place on the Burin Peninsula, November 19, 1929
Burin Peninsula, Nov 19 1929. On this date a large earthquake happened in the Gulf of Lawerence. As a result a large under water landslide took place off the coast of New Foundland near the Burin Peninsula. This landslide created a tsunami that caused significant damage and the loss of 29 lives. One of the worst tsunami related natural disaster’s in Canadian history. Material traveled rapidly and were measure by when communication lines were cut off.
What are tsunami-laid sediments?
During a tsunami, as waves reach land, sediments on the coast may be eroded and transported on land. It may remain there because the return flow is too weak to move it back to the ocean. The end result is a layer of sediment. A tsunami deposit that is thicker and coarser near the coast and thinner and finer further inland. While a lot of coarser sediment can be moved where wave energy is high near the coast, further inland where wave energy is less only smaller amounts of finer sediments is moved.
Explain the earthquake and tsunami hazard on the west coast of BC?
Most large earthquakes originate under the Pacific Ocean off the west coast of Vancouver Island. Historical tsunami deposit are confined to those coastlines exposed to the Pacific Ocean. Sheltered areas such as the Straight of Georgia and Juan De Fuca Straight are less prone to tsunamis. These deposits suggest a large earthquake with a tsunami occurs about every 300 years.
