Volcanoes

Austin Miller
Andie C
Sondos
Anita
Helen

Volcanoism

Patterns-densely follows the west coast of the Americas. Sparsely, throughout the Pacific,Americas, continues down the Eastern side of Asia, very dense from Russia down to Japan, through Malaysia and Polynesia.
Observations- Islands arise as geothermal activity pushes material up from the inside of the Earth. Strings of volcanoes follow the tectonic plate boundaries.

Geography

There is greater geographic variation following the tectonic plate boundaries. There is an overall greater altitude near the north and south poles.
The interaction of the plates creates a variety of geographic features. Ocean trenches often follow land masses. This is because the area where oceanic plates are subducted beneath the continental plates usually.

Geochronology
Running all along the Mid-ocean ridge you can see that it has the youngest volcano because new oceanic plate is coming up.
Seismology- follows tectonic boundaries, the ring of fire has the greatest depth of earthquakes.

Pacific Plate

Volcanism follows the edges with great density. Island chains are evidence of tectonic movement and direction of movement,it is like a scar. i.e. Hawaii.
The plate generally seems to be rotating counter clockwise. The Pacific is diverging from the Nazca plate, causing emergence of young sea floor.
The boundary following the North America continent is transforming, creating the San Andreas fault and causing a lot of shallow seismographic activity. On the Asian side of the plate is subducting and creating the Java/Figi trenches. On this side there is alot of deep seismographic activity.

http://enwikipedia.org/wiki/Eurasion_Plate
http://thegeosphere.pbworks.com/w/page22058923/Plate-Tectronics-Final-Map-Project