| | Michigan Halite |
 | | Since the Quincy is a copper mine located in Keweenawan lava flows far removed from sedimentary strata known to contain halite, and especially since many of the crystals show well-developed octahedral faces, it is believed that the occurrence and the mineral are worthy of description. |
 | | The part of the 85th level where the halite was found in such abundance has not been in use for six years, and the drift is subject to a continuous air current. |
 | | As the walls, floors, and crevices are covered with halite in a manner similar to the occurrences of calcium carbonate in limestone caves, it is believed that the halite was precipitated by evaporation from waters as they oozed from crevices in the rock or concentrated in small pools on the floor. |
| www.minsocam.org /MSA/collectors_corner/arc/mihalite.htm (614 words) |