Chapter 5 Flashcards
- Burin Peninsula November 18, 1929.
On this date, a large earthquake happened in the Gulf of St. Lawrence.
As a result, a large underwater landslide took place off the coast of Newfoundland near the Burin Peninsula.
This landslide create a tsunami that caused significant damage and the loss of 29 lives.
- What are tsunami laid sediments part 1
Sediment originally on the coast may be eroded and transported on land by waves breaking and travelling onto land.
It may remain there because return flow is too weak to move the sediment 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 finer further inland.
- 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.
Historically, tsunami deposits are confined to those coastlines exposed to the Pacific Ocean.
Sheltered areas such as the Strait of Juan De Fuca are less prone to tsunamis and in contrast, deposits are not found here.
These deposits suggest a large earthquake with a tsunami occurs about every 300 years
Where do earthquakes originate off the coast of BC
Most large earthquakes originate under the Pacific Ocean off the West Coast of Vancouver Island.
Where are tsunami deposits confined to in BC?
Historically, tsunami deposits are confined to coastlines exposed to the Pacific Ocean.
