Uplift, folding and wrinkling occur from the pressure exerted by the two plates an dmountains form. The Himalayas were formed this way with the collision of India and Asia which is still occurring to this day. This occurred during the end of the Mesozoic Era and on into the present day. When a volcano erupted, it released large amounts of carbon dioxide and water into the atmosphere. While the carbon dioxide was largely used by plants for photosynthesis, sunlight broke down the water molecules into hydrogen and oxygen molecules that added to the growing ozone layer.
MOuntains play other important roles regarding climate.
Mfany block moisture dense clouds from passing, forcing them to precipitate on one side of the mountain while leaving the other side relatively dry.