Keywords: Waterline-oily-sheen.jpg An oily sheen at the edge of a stream According to http //www umaine edu/waterresearch/FieldGuide/onthewater htm oily The University of Maine's A Field Guide to Aquatic Phenomena this sheen probably contains iron and manganese compounds produced by bacteria of the genus Leptothrix Note the orange-brown gelatinous-looking masses at the water's edge JIM CONRAD'S NATURALIST NEWSLETTER Written and issued at the woods edge near Natchez Mississippi http //www backyardnature net/n/08/080630 htm http //www backyardnature net/n/08/080630ao jpg 2008-06-30 Jim Conrad Jim Conrad See http //www backyardnature net/j/copyrite htm Leptothrix |