That's interesting. I know undergrads from UCSC also use the site. I guess I trust geologists to describe the material, its fiber diameter and length and whet

That's interesting. I know undergrads from UCSC also use the site. I guess I trust geologists to describe the material, its fiber diameter and length and whether the fibers are straight or curved, soluble or insoluble, and so forth. I don't think I would listen to geologists on matters of disease, though :-) I've been to this area a number of times. I'm comfortable with it because if you do the math, it's pretty darn hard to poison open air. Working with the material in confined spaces may be suicidal. Walking on it under an open sky seems harmless.