A glossary of mining and metallurgical terms
A glossary of mining and metallurgical terms
A glossary of mining and metallurgical terms
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40 A GLOSSARY OF MINING AND METALLURGICAL TERMS.<br />
PR(jFEssoR J. D. Dana's table <strong>of</strong> geological formations.<br />
SYSTEMS OR<br />
AGES.<br />
Age <strong>of</strong> man.<br />
Is<br />
tig<br />
GROUPS OR PERIODS.<br />
20. Quaternary.<br />
19. Tertiary.<br />
18. Cretaceous.<br />
17. Jurassic.<br />
16. Triassic.<br />
15. Permian.<br />
14. Caiboniferous<br />
13. Subcarboniferous.<br />
12. Catskill.<br />
11. Chemung.<br />
10. Hamilton,<br />
9. Corniferous.<br />
8. Oriskany.<br />
7. Lower Helderberg.<br />
6. Salina.<br />
5. Niagara.<br />
4. Trenton.<br />
3. Canadian.<br />
2. Primordial or Cambrian.<br />
1. .4rcha;au.<br />
FORMATIOXS OR EPOCHS.<br />
20. Quaternary.<br />
19 c. Pliocene.<br />
19 b. Miocene.<br />
19 a. Eocene.<br />
18 n. Upper Cretaceous.<br />
18 1). Middle Cretaceous.<br />
18 a. I.y0\ver Cretaceous.<br />
17. Jurassic.<br />
16. Triassic.<br />
15. Permian.<br />
14 c. Upper Coal Measures.<br />
14 b. Lower Coal Measures.<br />
14 a. Millstone Grit.<br />
13 b. Upper Subcarboniferous.<br />
13 a. Lower Subcarboniferous.<br />
12. Catskill.<br />
11 b. Chemung.<br />
11 a. Portage.<br />
10 e. Genesee.<br />
10 b. Hauiiltou.<br />
10 a. Marcellus.<br />
9 c. Corniferous.<br />
9 b. Schoharie.<br />
9 a. Cauda Galli.<br />
8. Oriskany.<br />
7. Lower Helderberg.<br />
C. Salina.<br />
5 e. Niagara.<br />
5 b. Clinton,<br />
oa. Medina.<br />
4 c. Cincinnati.<br />
4 b. Utica.<br />
4 a. Trenton.<br />
3 c. Chazy.<br />
3 b. Quebec.<br />
3 a. Calciferous.<br />
2 b. Potsdam.<br />
2 a. Acadian.<br />
1 b. Hurouiau.<br />
1 a. Laurentian.
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