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| a mountain formed of lava and/or pyroclastic material |
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| magma that has reached the earth's surface |
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| opening to the surface from which lava flows; volcanoes may have more than one vent |
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| a funnel shaped pit at the tip of a volcanic cone- formed when material is blown out of the vent |
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| a major volcanic and earthquake zone located from Iceland through the middle of the Atlantic Ocean |
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| a major volcanic and earthquake zone which is located from Asia into India [includes Italy, Greece and Turkey] |
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an area where the earth's plates are moving apart
example: Mid-Atlantic Ridge |
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| long deep cracks formed from the separation in a divergent boundary |
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| an area where the earth's plates are moving together |
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where magma works its way to the earth's surface within the interior of a plate - magma is forced up and burns through the crustal plate
example: Hawiian Islands |
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| a wide, gently sloping mountian made of layers of lava and formed by quiet eruptions- example: Mauna Loa in Hawaiian Island |
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| a steep, cone-shaped hill or small mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening example: Paricutin in Mexico |
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a tall cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic materials
is formed from both quiet and explosive eruptions,example: Mount St. Helens |
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| largest INTRUSIVE igneous rock bodies-formed when magma cools underground before reaching the surface |
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| an intrusive volcanic feature which is a flow of magma that cuts across rock layers - forms when magma is pushed up through cracks in the rock layers - NOT parallel(vertical) to rock layers- tube shaped |
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| an intrusive volcanic feature which is a flat layer of igneous rock between rock layers - forms when magma flows between rock layers - always parallel to the other layers |
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| an intrusive volcanic feature which is a flat layer of igneous rock between rock layers - forms when magma seeps between layers and continues to fill that space, pushes up ground above it- forms small DOME mountains |
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a large collapsed depression in a volcano
forms when the walls of the crater fall back into the vent or top of a volcano following an erruption |
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| the resistance of a liquid to flowing |
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is the name given to particles made in volcanic eruptions
called tephra or pyroclastics |
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| an intrusive igneous structure that results from the cooling and hardening of magma beneath the surface of Earth |
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| the change in temperatuer going deeper into the earth |
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| meltingn due to a drop in confining pressure that occurs as rock rises |
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| a chain of volcanoes that are located around the edges of the Pacific Basin |
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| igneous activity that occurs within a tectonic plate away from plate boundaries |
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