Pangea : The hypothetical landmass that existed when all continents were joined, from about 300 to 200 million years ago. Continental Drift Theory: Idea that the continents were once one continent but they have moved to be separate continents today.
Pangea: The hypothetical landmass that existed when all continents were joined, from about 300 to 200 million years ago.
Continental Drift Theory: Idea that the continents were once one continent but they have moved to be separate continents today.
Plate Tectonics: The Earth is made up of 14 different Plates in which we are floating on. When the plates collide they can create earthquakes, volcanoes, mountains, tsunamis or geysers.
Boundary where two plates are moving away from each other and new crust is forming from magma that rises to the Earth's surface between the two plates.
Subduction Zone is the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.OceanicConvergent Plate Movement and Subduction Zone
Oceanic Convergent Plate Movement is when an oceanic plate and continental plate collide the and crust is destroyed and recycled back into the interior of the Earth as one plate dives under another.
When two continental plates collide head-on. The crust tends to buckle and be pushed upward or sideways.
Magma: Molten material beneath or within the earth's crust, from which igneous rock is formed.
Lava: The molten, fluid rock that issues from a volcano or volcanic vent.
A type of volcano made of many layers of broken rocks and ash. Wizard Island found in Crater Lake and Lava Butte in Oregon are examples.
This volcano is made from many layers of lava. This lava was very fluid when it flowed out of the volcano. These volcanoes have very large bases. Most Hawaiian volcanoes are this type.
This volcano is made of alternating layers of ash and lava. They are very explosive volcanoes. Mt. St. Helens and Mt. Rainier is this type.
Crater Lake is a caldera, the remains of an ancient Pleistocene volcano named Mt. Mazama. The caldera was formed when Mt. Mazama violently erupted some 7600 years ago, causing the entire top of the mountain to fall in on its self. Once it collapsed and sealed, snow melt and rain filled the caldera, and formed what we know now as Crater Lake.
Earthquake: A sudden violent movement of the earth's crust caused by the release of stress faults or by volcanic activity.