In this expedition we will
examine the creation, evolution and destruction of the crust of
the earth below the oceans at the boundaries between the plates. Remember that the crust of the earth is the upper part of the rigid outer layer of the earth, called the lithosphere, which composes the major plates.
The process of plate motion results in
the slow, yet powerful, interaction between the plates, ultimately causing the earthquakes that shake the
Earth and the volcanoes that erupt ash, gas and hot lava...often creating
new rock on the surface of the Earth, especially under the oceans.
Expedition Objectives: We will learn about the dynamic nature
of the Earth. Students will come to understand that the surface
of the Earth, including that portion under the sea (approximately
70% of the earth's surface), is in a state of constant formation
and motion, ultimately to be recycled back into the interior of the Earth over
many ten's of millions of years. This process has influenced
the chemistry of the ocean and atmosphere, and therefore, life
on this planet. It may have even resulted in the origin of
life on this planet as we will explore in subsequent expedition.