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.
Pacaya is a complex volcano, consisting of an older stratovolcano, domes, flows, tephra, and the modern basaltic stratovolcano. Most of the complex has formed in the last 23,000 years. Pacaya has erupted at least 23 times since 1565.