Volcanoes I. Where volcanoes happen A. Mid Ocean Ridges
IV. Internal/Intrusive volcanic landforms
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| IV. Internal/Intrusive volcanic landforms
Internal or intrusive volcanic landforms are things we can identify inside the earth's crust that are formed because of volcanic activity. They can be seen today because the rock above has been worn away. SEE DIAGRAM P.41 1. Batholith- a large area or mass of magma found in the earths crust which cooled slowly over millions of years and formed igneous rock e.g. granite. Examples in Ireland are The Wicklow Mts and The Mourne Mts. (The rock that once covered these masses of magma has been worn away). 2.Sills- magma forces its way between two rock layers and solidifies. (Like a window sill). 3. Dykes- magma slices across rock layers and forms a wall of granite or basalt. These are often found in volcanoes and support the volcanic mountain. 4. Laccolith- Magma forces its way between rock layers are forces the rock above to move up creating a dome shape. 5. Lopolith- Magma forces its way through the layers in the rock but this time pushed the rock below it downwards to form a bowl shape. Directory: wp-content -> uploads -> 2015 2015 -> Lesson plan template 2015 -> The heart and mind of a steward leader 2015 -> Artificial Intelligence 2015 -> 8 shocking predictions for life after 2020 from Google's genius futurist 2015 -> Summer assignment for ap us history 2015 -> 8th Grade New Deal Inquiry Was the New Deal a Good Deal? 2015 -> Lesson plan template 2015 -> Lesson plan template 2015 -> Conditions of Antebellum Slavery Share with your friends:
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