Transactions . diminishes in thickness more or less throughout the mines. Thisslate is very interesting, as it contains the only organic remains (aLingula) I have observed in the formation ; it is also the depositoryof the only crystallized form of the nickel and cobalt ores, whichoccur in beautiful cubes of cobalt glance. This disseminated occurrence of the lead ore is probably the mostvaluable wc have in Missouri, and although not yielding as largelyin a given area as do the clay diggings and cave formations of Middle and Southwest Missouri, the mining is probably the moreremunerative as the
Transactions . diminishes in thickness more or less throughout the mines. Thisslate is very interesting, as it contains the only organic remains (aLingula) I have observed in the formation ; it is also the depositoryof the only crystallized form of the nickel and cobalt ores, whichoccur in beautiful cubes of cobalt glance. This disseminated occurrence of the lead ore is probably the mostvaluable wc have in Missouri, and although not yielding as largelyin a given area as do the clay diggings and cave formations of Middle and Southwest Missouri, the mining is probably the moreremunerative as the yield is more constant. II. X)^.s-m /^Y«i —There are two ways in which theflat sheets occur, one is in strata containing the disseminated ore,and is caused by greater quantities of the ore being concentrated at 120 LEAD ORES IN MISSOURI. (liiferent points, presenting the appearance of sheet-mineral; butwhen this is the case the sheets are of small dimensions, usually afew inches in extent, ra
Size: 1532px × 1630px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
