Mobile, Alabama. Mobile, Alabama, on the Gulf of Mexico, is home to Evonik's largest North American site. The 700 or so employees here produce hydrogen peroxide, fumed silica, and the animal feed additive methionine, among other chemicals.
A complex volcano, also called a compound volcano, is a volcano with more than one feature. They form because of changes in their eruptive characteristics or the location of multiple vents in an area.
Composite volcanoes are also called stratovolcanoes because of the alternating layers, or strata, of which they are made (Figure 8.22). The magma that creates stratovolcanoes tends to be more viscous, or thick. Viscous lava creates greater pressure which, in turn, tends to create explosive eruptions.esson Summary [edit]. 1  Composite cones, shield volcanoes, cinder cones and supervolcanoes are some of the types of volcanoes formed. 2  Composite cones are tall, cone shaped volcanoes that produce explosive eruptions. 3  Shield volcanoes form very large, gently sloped volcanoes with a wide base.