“Then, O Brahmana, out of the deep came a tremendous roar like unto the roar of the clouds at the Universal Dissolution. Diverse aquatic animals being crushed by the great mountain gave up the ghost in the salt waters. And many denizens of the lower regions and the world of Varuna were killed. Large trees abounding with birds on the whirling Mandara were torn up by the roots and fell into the water. The mutual friction of those trees also produced fires that blazed up frequently.

In plain words: A huge roar came from the ocean. Many sea creatures and beings of the underwater world were crushed and killed by the mountain. Trees full of birds were torn off and fell into the water, and fires broke out as they rubbed together.