Natural Science Forum / Earth Science / Mineralogy / April 2004

I want to know the actual cause of selenium accumulation in
agricultural soils .except for rain water that brings it from hills.
is there any chances of pressure gradient that may cause the
accumulation of selenium in paricular  patches (1/2 miles long)of

I'm a student and I'm currently working on Rogaland Anorthosites as a
building material. Mostly about the technical properties and
consequences for the application of the rock in the building industry.
I am looking for information about this rock, concerning its:

Please help me identify a mineral from a (probably) silver mine in Austria:
http://homepage.boku.ac.at/h9440283/unknown.htm
Thank you very much, Christof

Does chlorite dissolve in water?  I'm thinking of using a piece of
black/green (graphite/chlorite) slate in a fish tank, and I'm wondering if
the chlorite would prove poisonous.  I know graphite doesn't dissolve in
water (please correct me if I'm wrong), can I assume chlorite ...

My younger old brother wants to get some green Kryptonite.  I told my
brother that it does not exist.  He told me that he wants me to get a
rock that looks like Kryptonite from either the tv show Smallville or
from the movie.