标题：THE EFFECT OF GLUCONIC ACID SECRETION BY PHOSPHATE-SOLUBILIZING PSEUDOMONAS PUTIDA BACTERIA ON DISSOLUTION OF PYROMORPHITE Pb5(PO4)3Cl AND Pb REMOBILIZATION
摘要：In general, the trace fossil Rusophycus, preserved as a concave-upward structure on the top of a bed, is considered to be a fossilized marking, made by a trace maker. The structures described from the Cambrian (Furongian) of central Poland are genetically related to Rusophycus. However, despite their occurrence on the tops of beds, they are not fossilized traces, but compaction-related features, resulting from differential sandstone and mudstone compaction with possible mediation by organic-rich, heterolithic sediments. The preservation of these structures probably was influenced by biofilms or biomats.
