Bulletin . ied by the Chester,which it overhes. GEE BODIES. The ore bodies are chiefly in the Boone formation and their char-acter varies with their position. The upper 100 to 150 feet of theformation is cherty, crystalhne limestone, underneath which is 2 to 8feet of oohtic limestone known as the Short Creek oohte. Beneaththe Short Creek is 100 feet of cherty, coarsely crystalline limestonesimilar to that above. Underlying this division is 8 to 30 feet ofchert known as the Grand Falls chert. The lower part of the Booneformation consists of 50 to 100 or more feet of bluish limestone andchert wh
Bulletin . ied by the Chester,which it overhes. GEE BODIES. The ore bodies are chiefly in the Boone formation and their char-acter varies with their position. The upper 100 to 150 feet of theformation is cherty, crystalhne limestone, underneath which is 2 to 8feet of oohtic limestone known as the Short Creek oohte. Beneaththe Short Creek is 100 feet of cherty, coarsely crystalline limestonesimilar to that above. Underlying this division is 8 to 30 feet ofchert known as the Grand Falls chert. The lower part of the Booneformation consists of 50 to 100 or more feet of bluish limestone andchert which rests upon the Mississippian or Devonian shale. The ore bodies above the Grand Falls chert are usuaUy irregularand he mainly at the contact of the undecomposed Boone limestoneand the shale or sandstone of the Cherokee, which occupies old de-pressions or solution channels in the limestone. The Grand Fallschert has been minerahzed rather uniformly over large areas and BUREAU OF MINES BULLETIN 154 PLATE II. A. HAND WINDLASS USED AT PROSPECT SHAFT.
Size: 1904px × 1312px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
