Mysterious Clay Particles Falling from the Sky: Reader Theories

Readers offer theories on clay particles appearing to rain from the sky:

• Dirt rain / wind-blown clay from construction sucked into storms.
• Comet/meteor dust (iron oxide).
• African dust clouds crossing the Atlantic.
• Cicada wasp or yellow jacket nest debris.
• Barn swallow mud balls dropped in flight.
• Blasting project debris.
• Texas topsoil carried by upper-level winds (historical account).

The winning theory is linked at the bottom of the page.