A glossary of mining and metallurgical terms

A GLOSSARY OF MINIXG AND >f ETAI.I.URGICAL TERMS. 43
3a. Calci/erous. Sandj' magnesian limestone, calcareous sandstone.
3b. Quebec. Sandstone, limestone conglomerate, black slate
3e. Chnzy. Limestone, chert.
4a Trenion. Liniestone, buff and blue ; dolomite carrying lead ore deposits ;
brown-bematite beds.
4b. Utlca. Dark carbonaceous slate ; impure limestone.
4c. Hudson River. Slate, shale, clay, grit.
5a. Medina. Conglomerate ; argillaceous sandstone.
5b. Clinfon. Sandstone, shale, conglomerate, limestone, fossiliferous red hem-
atite, or oolitic iron-ore bed.
5c. Kiagara. Clay shale ; limestone.
t>. Salina. Red shale, gypseous shale, hydraulic lime, salt.
7. Lower Helderberg. Limestone, shaly or compact, and fossiliferous.
8. Oriskany. Sandstone.
9. Corniferous or Upper Helderberg. Principally limestone.
9a. Caudu-galli. Fine-grained calcareous and argillaceous, drab or brownish
sandstone ;
peculiar fossils.
9b. Schoharie Grit. Fine-grained calcareous grit, similar to 9a, but with dif-
fering fossils.
9c. Oncndaga, and 9d. Corniferous. Gra}-, blue, black limestone. At the top
of 9d occur the Marcellus iron ores (carbonate).
10a. Marcellus. Black or dark-brown bituminous and pyritiferous shales. In
10a and 9d occur the petroleum deposits of Canada.
10b. Hnrnilioii. Slate, shale, sandstone, calcareous and argillaceous.
10b. Tally. Impure dark limestone.
10c. Genesee Black claj' slate.
11a. Portage. Green and black sandy and slaty shales, sandstone, flagstone.
lib. Chemung. Thin-bedded greenish sandstones and flagstones, with inter-
vening shales, and rarely beds of impure limestone.
12. Catsklll. Red, gray sandstone, grindstone grit, greenish shale, conglom-
erate.
13a. Lower Subcarboniferous. Sandstone, limestone, small local coal beds.
13b. Upper Subcarboniferous. Red shale, red and gray sandstone, blue lime-
stone.
14a. Millstone grit. White or yellow sandstone, and conglomerate of quartz
j)ebbles.
14b. and 14c. Coal measures. Fire-clay, shale, sandstone, conglomerate, lime-
stone, bituminous coal, anthracite, iron ore, salt.
15. Permian. Limestone, sandstone, marl, shale.
16. Triassic. Red sandstone, red shale, conglomerate, lignite, trap dikes, cop-
per ore, coal.
17. Jurassic. Marl, limestone, probably the gold-bearing slates of Cali-
lornia.
18. Cretaceous. Earthy beds of sand, marl, clay, limestone, chalk, lignite.
19. Tertiary. Earthy sand, clay, marl, limestone, sandstone.
20. (Quaternary. Sand, pebbles, boulders, clay, diluvium, alluvium ; gravel
and placer tin and gold deposits.
Note.—The jirimary and crystalline schistose rocks contain the larger number
of mineral veins. The ancient magnesian limestones (probably Devonian) arc
characterized in many localities by deposits of argentiferous lead ore and of
zinc ore.