VOL. 28, 1916, PL. 25 



GALENA LIMESTONE FROM ETNA, WISCONSIN 



The (lark-stained bodios an- cross-stM-l ioiu 

 dolomite. Algal bodies are invadecl l.y doloinil. 

 10 times, is from the liasal beds of Calcna linn 



ot: al,i;al secretions. The white, grau^lai' cement is 

 along Ixirder and in cracks. This specimen, magniti(>d 

 ;|onc Ilea I- lOtna. Wisconsin. 



