EARTH ENVIRONMENTS I 2 
EARTH ENVIRONMENTS I: GEOMORPHOLOGY AND SOILS
Question: compare and contrast the styles of eruptions and the volcanic features both landward and seaward of the Andesite Line.
“The term andesite line predates the geologic understanding of plate tectonics.” In that it was the term first used to describe the unique structure of the gushing destructive volcano boundary. This term used for the first in 1912 by a man known to be Patrick Marshall of New Zealand. The andesite line is located in the Pacific Ocean basin where it stands as the most significant geological region as once again its unique characteristic of having both mafic basaltic volcanic rocks and felsic andesitic volcanic rocks on its margin. The question might be asked does having both these rocks leads to different volcanoes or eruptions style? Is it the same activity for both the land and sea? Well this essay aims to inform on all there is to know about this significant geological regarding volcanoes, the styles of eruption the structure and last but not least the feature of volcanoes on both the land and sea of this same significant line.
The landward side of the andesite line has explosive eruption as it is located at subduction zones while the seaward side is locate at oceanic ridges. The explosiveness of the eruption has to do with the flow of the magma and for the landward side the magma originated from the subduction zone. This zone has magma that are of high viscosity, they are granitic-andesitic and excrude at 700-9000c, have thick short flows that has slaggy surface, they cover large distance at slow pace to be specific 10m/hr on flat surface and 100m/hr on slopes. They are said to be explosive because they have ash associated with the eruptions as well as being acidic at times. With this type of magma a variety of eruptions can occur all of which are explosive. Some of these include strombolian ,vulcanian and vesuvian, plinian and pelean eruptions. Strombolian eruptions are of short
Question: compare and contrast the styles of eruptions and the volcanic features both landward and seaward of the Andesite Line.
“The term andesite line predates the geologic understanding of plate tectonics.” In that it was the term first used to describe the unique structure of the gushing destructive volcano boundary. This term used for the first in 1912 by a man known to be Patrick Marshall of New Zealand. The andesite line is located in the Pacific Ocean basin where it stands as the most significant geological region as once again its unique characteristic of having both mafic basaltic volcanic rocks and felsic andesitic volcanic rocks on its margin. The question might be asked does having both these rocks leads to different volcanoes or eruptions style? Is it the same activity for both the land and sea? Well this essay aims to inform on all there is to know about this significant geological regarding volcanoes, the styles of eruption the structure and last but not least the feature of volcanoes on both the land and sea of this same significant line.
The landward side of the andesite line has explosive eruption as it is located at subduction zones while the seaward side is locate at oceanic ridges. The explosiveness of the eruption has to do with the flow of the magma and for the landward side the magma originated from the subduction zone. This zone has magma that are of high viscosity, they are granitic-andesitic and excrude at 700-9000c, have thick short flows that has slaggy surface, they cover large distance at slow pace to be specific 10m/hr on flat surface and 100m/hr on slopes. They are said to be explosive because they have ash associated with the eruptions as well as being acidic at times. With this type of magma a variety of eruptions can occur all of which are explosive. Some of these include strombolian ,vulcanian and vesuvian, plinian and pelean eruptions. Strombolian eruptions are of short