The Gambia has no migrating wildebeest, giraffes or any of the large animals commonly associated with Africa. However without leaving your hotel you can see a breathtaking variety of bird life, in addition to monkeys and lizards. Baboons and crocodiles can be seen nearby and then far up the river, hippos.
As the gasses collect in the magma chamber, the pressure rises. It is possible for the pressure to rise so much that the chamber cannot contain the magma and it erupts explosively. Some US Parks that have active volcanoes formed as the result of subduction related processes are: 1  Crater Lake National Park, OR.
Volcanoes formed near plate subduction zones emit gasses that affect the atmosphere. Gases are also emitted from hydrothermal vents that can be found at mid-ocean ridges. Mountain ranges that are formed can affect weather patterns, such as the Himalayas, which are responsible for major monsoons in Asia.