2 adjectives to describe pulverization

Every instant the wall of fire is drawing closer in, the roll of the thunder is continuous, a dismal pulverization of 90,000 men!

The reason for this separation not being effected by those mechanical appliances so common in most ore dressing establishments, such as stone breakers or crushing rolls, is simply because the ores are so rich in silver, and frequently of such a brittle nature, that any undue pulverization would certainly result in a great loss of silver, as a large amount would be carried away in the form of fine dust.

2 adjectives to describe  pulverization