Partial results on the analysis of the ejecta from the SpaceX Starship launch. The visible and infrared spectra of the fine particles that rained down on Port Isobel do not match the concrete or the Fondag that was picked up on the beach.

We have more samples to analyze to get higher confidence, then we will send samples to @Prof_Hafner
of Rice University for Raman spectroscopy. If the fines that rained down are not from broken-up concrete, then they must be from the sand under the concrete.

So I hope @Prof_Hafner
can help identify their composition.

NASA is interested in this research because it will help inform how to build lunar launch pads. We've never seen a launch pad event like this, and it has similarities to expected failure modes of lunar launch pads.