It is common for caves within the Earth to be formed of chemical sedimentary rocks. Evaporites, a special type of chemical sedimentary rock that include halite and gypsum, form as sediments, and are left behind when water in the original solution evaporates. To unlock this lesson you must be a Study.com Member.
People generally know the aurora borealis by their common name, the Northern Lights. The northern lights are natural phenomena that occur in nature. Often on a clear, dark night in the boreal forest, green, purple, pink, and white lights dance on the horizon changing their shape and color. It is perhaps one of natureâ¢s most fascinating displays of artistry. Specifically, the aurora borealis is Latin for ï¬northern dawn.ï¬ The aurora australis is the same phemonena in the southern hemisphere, most visible from Antarctica, Australia, and New Zealand.
Auroras that occur in the northern hemisphere are called âAurora Borealisâ or ânorthern lightsâ and auroras that occur in the southern hempishere are called âAurora Australisâ or âsouthern lightsâ. Both Auroraâs can be seen in the northern or southern hemisphere, in an irregularly shaped oval centred over each magnetic pole.