The stratovolcanoes are made up of layers of lava flows interlayed with sand-or gravel-like volcanic rock called cinders or volcanic ash. These volcano land formations are typically 10-20 miles across and up to 10,000 or more feet tall.
http://ete.cet.edu/gcc/?/volcanoes_types/
1 If lava flows are emitted from tephra cones, they are usually emitted from vents on the flank or near the base of the cone during the later stages of eruption. 2  Cinder and tephra cones usually occur around summit vents and flank vents of stratovolcanoes.
http://www.tulane.edu/~sanelson/Natural_Disasters/volclandforms.htm
1 Vents for most shield volcanoes are central vents, which are circular vents near the summit. 2  Hawaiian shield volcanoes also have flank vents, which radiate from the summit and take the form of en-echelon fractures or fissures, called rift zones, from which lava flows are emitted.
http://www.tulane.edu/~sanelson/Natural_Disasters/volclandforms.htm
1 Have steeper slopes than shield volcanoes, with slopes of 6 to 10 o low on the flanks to 30 o near the top. 2  The steep slope near the summit is due partly to thick, short viscous lava flows that do not travel far down slope from the vent.
http://www.tulane.edu/~sanelson/Natural_Disasters/volclandforms.htm
Tectonic plate interactions are of three different basic types: 1  Divergent boundaries are areas where plates move away from each other, forming either mid-oceanic ridges or rift valleys. 2  These are also known as constructive boundaries. 3  Convergent boundaries are areas where plates move toward each other and collide.
http://www.bbc.co.uk/science/earth/surface_and_interior/plate_boundary
Very little pyroclastic material is found within a shield volcano, except near the eruptive vents, where small amounts of pyroclastic material accumulate as a result of fire fountaining events. Shield volcanoes thus form by relatively non-explosive eruptions of low viscosity basaltic magma.
http://www.tulane.edu/~sanelson/Natural_Disasters/volclandforms.htm
There are three main types of plate boundary: divergent, convergent and transform. Plates move away from one another at divergent boundaries. This happens at mid-ocean ridges. Plates move towards one another at convergent boundaries; one plate is forced below another in a process called subduction. Earthquakes and composite volcanoes are common at this type of boundary. Plates move past on another at transform boundaries. The most famous example of this type of boundary is the San Andreas Fault in California. Image: Cutaway artwork showing different types of plate boundary and hotspots.
http://www.bbc.co.uk/science/earth/surface_and_interior/plate_boundary
Stratovolcanoes show inter-layering of lava flows and pyroclastic material, which is why they are sometimes called composite volcanoes. Pyroclastic material can make up over 50% of the volume of a stratovolcano. Lavas and pyroclastics are usually andesitic to rhyolitic in composition.
http://www.tulane.edu/~sanelson/Natural_Disasters/volclandforms.htm
Volcanoes are distinguished by their eruption style, composition, and structure. Volcanoes act differently and form differently because they are made up of different types of rocks and minerals. Below is a description of common volcano types that can be recognized as distinguishable land formations. For more than 200 years keen observers have noted that some volcanic eruptions affect weather and climate. Scientists report that large eruptions at low latitudes can cause the greatest global climate change.
http://ete.cet.edu/gcc/?/volcanoes_types/
The second type may be familiar to you from news reports from Hawaii: the shield volcano. This type of volcano can be hundreds of miles across and 10,000 feet high. A shield volcano is characterized by gentle upper slopes (about 5 degrees) with somewhat steeper lower slopes (about 10 degrees). The shield volcanoes are almost entirely composed of relatively thin lava flows built up over a central vent.
http://ete.cet.edu/gcc/?/volcanoes_types/
what types of plates form volcanoes
Divergent, convergent, and transform are the types of plates to form volcanoes. The types pf plates from volcanoes are divergent, convergent and transform.