Origination of Jyotirling

There are 12 Jyotirlinga and there is legend behind origin of Jyotirlingam. As per legend, Once there was conflict between Brahma and Vishnu on supremacy when Lord Shiva appeared as flame and challenged them to find Source  or End of flame. Lord Brahma lied that he found it and Lord Vishnu honestly accepted his defeat. Lord Shiva got angry on lies of Lord Brahma and came in form Kaal Bhairao, this was the time when there was vibration in flame and 12 particles from it dropped at 12 places on earth which today is popularly known as Jyotirling at the same time Kal Bhairao took apart one head of Brahma & cursed him that he will not be prayed even being creator of universe.