Subspecies. 1  H. c. charithonia, Ecuador. 2  H. c. simulator, Jamaica. 3  H. c. bassleri, Colombia. 4  H. c. churchi, Haiti. 5  H. c. tuckeri, Florida. 6  H. c. vazquezae, Mexico. 7  H. c. ramsdeni, Cuba. 8  H. c. antiquus, St. Kitts, Antigua.
See also: Convection. In the field of fluid dynamics, a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas.These density differences result in rising and/or falling currents, which are the key characteristics of a convection cell.ee also: Convection. In the field of fluid dynamics, a convection cell is the phenomenon that occurs when density differences exist within a body of liquid or gas.
Vesicles are air bubbles that form in extrusive igneous rock. What sub-type of igneous rock contains vesicles and why does it contain them? Vesicles are commonly found in extrusive igneous rock because of gases that form from lava as the material solidifies -- like bubbles in a bottle of soda when you open it.