Ecological and Geological Concepts of Orcas Island

The video explores geological features on Orcas Island, focusing on evidence of past shaking events, landslides, and tsunamis. It explains how these events have shaped the seafloor and impacted nearby islands like Barnes and Clark. The video also highlights the seafloor's morphology, which supports various marine habitats, including those for forage fish and Rockfish. By studying these features, scientists can infer the timing and magnitude of past tsunamis and understand the ecological significance of the seafloor's structure.

What type of geological evidence is found on Orcas Island indicating past seismic events?

• Volcanic eruptions

• Landslides and rockfall debris

• Glacial deposits

• Meteorite impacts

What natural event was generated by the landslide on Orcas Island?

• A hurricane

• A tsunami

• An earthquake

• A volcanic eruption

What are tsunamiites?

• Volcanic rocks

• Glacial deposits

• Meteorite fragments

• Sedimentary layers formed by tsunamis

What is the significance of the landslide apron on Orcas Island?

• It shows evidence of past landslides

• It indicates volcanic activity

• It is a site of meteorite impact

• It is a glacial formation

Which islands were likely impacted by tsunamis generated from landslides on Orcas Island?

• San Juan and Lopez Islands

• Barnes and Clark Islands

• Vancouver and Victoria Islands

• Whidbey and Camano Islands

What can the morphology of the seafloor help scientists analyze?

• Volcanic activity

• Air quality

• Weather patterns

• Marine habitats

What type of fish is associated with sediment wave fields?

• Cod

• Shark

• Tuna

• Sand lance

Which marine animals prey on sand lance?

• Dolphins

• Rockfish and salmon

• Sea turtles

• Jellyfish

Where are potential Rockfish habitats located around Orcas Island?

• In coral reefs

• In sandy beaches

• In rock bridges and exposures

• In the open ocean

What is the ecological significance of rock exposures around Barnes and Clark Islands?

• They are sites for coral growth

• They are areas of high volcanic activity

• They are breeding grounds for whales

• They provide habitats for Rockfish