Volcanism and Mantle Plumes

The lecture explores Hawaii's volcanic activity, focusing on interplate volcanism and mantle plumes. It explains how mantle plumes create volcanic islands and large igneous provinces, impacting geological formations and extinction events. The session concludes with a summary of mantle plumes' significance in Earth's geology.

What is the primary composition of Mauna Loa's lava flows?

• Granite

• Rhyolite

• Andesite

• Basalt

Why is Hawaii considered an example of interplate volcanism?

• It is located at a plate boundary.

• It is situated in the middle of a tectonic plate.

• It is formed by subduction zones.

• It is caused by continental drift.

What is the main reason for the formation of volcanic island chains like Hawaii?

• Subduction of oceanic plates

• Erosion of continental shelves

• Collision of continental plates

• Movement over a mantle plume

How does the lava lamp analogy help explain mantle convection?

• It illustrates the formation of tectonic plates.

• It shows how heat is conducted through the mantle.

• It demonstrates the rise of hot material from boundary layers.

• It explains the cooling of the Earth's core.

What is a large igneous province?

• A small volcanic island

• A type of sedimentary basin

• A large accumulation of igneous rocks

• A tectonic plate boundary

Which event is often associated with the formation of large igneous provinces?

• Glacial periods

• Oceanic trench formation

• Mass extinction events

• Formation of mountain ranges

What is the 'plume head and tail' hypothesis?

• A theory about the movement of tectonic plates

• A model explaining the formation of oceanic trenches

• A hypothesis describing the initial and ongoing volcanic activity from mantle plumes

• A concept about the cooling of the Earth's core

Which of the following is NOT a characteristic of a mantle plume?

• Originates from boundary layers

• Causes volcanic island chains

• Can lead to large igneous provinces

• Moves faster than tectonic plates

What geological feature is formed as a tectonic plate moves over a stationary mantle plume?

• Oceanic trench

• Mountain range

• Volcanic island chain

• Continental rift

Which of the following is a potential consequence of large igneous province formation?

• Formation of new tectonic plates

• Mass extinction

• Increased glaciation

• Rise in sea levels