Re: glauconite

David Campbell (
Thu, 5 Feb 1998 10:39:14 -0400

>100 meters is from lots of sources, but Weaver is the one I was quoting.
>Mason and Berry (Elements of Mineralogy) simply state "ocean floor far from
>sources of sediment" That is where it is found today, and the reasons why
>it is not found in shallow water are genetic, it is a mineral formed under
>reducing conditions, and shallow water is generally oxygenated.

"Far from sources of sediment" can occur in shallow water, as long as a
muddy river is not too close. Likewise, glauconite forms typically in
pores in the sediment, so the oxygenation of the water column is