INDEX. 



1253 



Page. 



Chloridation, alterations produced by -- 400 



definition of . . 206 



Chloride of magnesium. See Magnesium chloride. 

 Chloride of sodium. See Sodium chloride. 



Chloride order of rocks, deposits composing 789-790 



Chlorine, emission of, during volcanic eruptions, ob- 

 servations on 789-790 



in earth's crust and in the ocean, amount of.. 978-979 



in earth's crust, percentage of 936,978-979 



in ocean, amount of _ 944 



in sea salt, percentage of 942,943 



Chlorophyllite, chemical and physical constants 



of ._.. 196,291 



source and mode of formation of 291,370,386,402 



Chlorites, alterations and alteration products of . . . 347- 



348,373,380 



chemical and physical constantsof 196,345-346 



occurrence of _ 346-347 



sources and modes of formation of 273,275-276, 



278, 285, 287, 290, 302, 303, 304, 322, 324, 



326, 327, 328, 339, 340, 341, 342, 343, 347, 



353, 354, 369, 375, 378, 381, 382, 384, 386, 



389, 390, 391, 393, 398, 402, 403, 404, 625 



See also names of minerals of the group, Ames- 



ite, etc. 



Chloritoid, alterations and alteration products of. . 345 



chemical and physical constants of 196,344 



occurrence and source of_. 345 



porphyritic, thin section of 704 



sources and modes of formation of 345 



Chondrodite, alterations and alteration products of. 325, 



373,380,403 



chemical and physical constants of 196,325 



occurrence of L 325 



Chromite, occurrence of 228,229-230 



chemical and physical constants of.. _ 196,228 



source and mode of formation of 309, 370 



Chromium in earth's crust, percentage of 936,1002 



Chrustschoff, K. von, on laboratory production of 



certain minerals _.. 685 



on minerals obtainable from -water solutions at 



high temperature and pressure. 1057 



Chrysolites, alterations and alteration products 



of 308-311 



chemical and physical constants of 199, 308 



occurrence of 308 



Cimolite, chemical and physical constants of 196, 254 



sources of 254,370,389 



Circulation of ground water, causes of, summary.. 152 



factor opposing , 153-154 



f orces and movements involved in 146-152, 416-423 



influence of size and continuity of rock openings 



on speed of 154-155 



rapidity of factors determining 154-155 



See also Ground water; "Water. 

 Clarke, F. W., on alterations of albite and anorthite. 264 

 on atmosphere, hydrosphere, and litrosphere, 



chemical composition of _ . 933 



on carbon in earth's crust 963 



on carbon in shales _ _ 897 



on chemical action in solutions, throry of 68 



on chlorophyllite, formation of, from iolite 291 



on clays and soils, average chemical composi- 

 tion of 891 



on "crust -of the earth," definition of term 192 



on depth limit of observation of earth'sstructure 31 



Page. 

 Clarke, F. W., on earth's crust, chemical composi- 

 tion of.. 192-193,934-938,959,974,975,981,983, 

 984, 986, 987, 989, 990, 992, 993, 999, 1000, 1002 



on feldspar minerals, abundance of 252 



relations of, to zeolites 261 



on ferric oxide in clays and shales, amount of ._ 898 

 on igneous and crystalline rocks, average chem- 

 ical composition of 889,890 



on iron (metallic) in original igneous rocks, 



amount of 1045 



on lithosphere, limits of 932 



on'mesolite... 262 



on ocean, chemical composition of 944 



on oxygen in earth's crust, percentage of 948 



on penninite, composition of 344 



on quartz, abundance of 217 



on shales, average chemical composition of... 890,891 



on silicates, alkaline reaction of 86,87 



on tourmaline, constitution of 326 



on water combined in rocks, amount of 162 



on zeolites, alterations of 333 



composition of _ _ 329 



Clarke, F. W., and Hillebrand, W. F., on chemical 



action in solutions, theory of 68 



on rock analyses 693 



on rocks of Pigeon Point, Minn., composition of. 733 



on slate, chemical composition of 895 



on water content of rocks, relation of, to recrys- 



tallization 743,744 



Clay, chemical composition of _ 891 



pore space in 126 



volume changes requisite to produce.. ._ 523-524 



Clay soils, effect of freezing on _ _ 443 



Cleavage, display of, by weathering 525 



meaning of _ 760 



monoclinal, existence of, over extensive areas. 928-931 

 Clements, J. M., on cementing material and rock 



cemented, similarity of. ._ 628 



on chert rocks of Lake Superior region 851 



on contact metamorphism _ 1350 



on CrystalFalls volcanics.. _. ]078 



on devitrification 247 



on schists of Lake Superior region 904 



on secondary sulphides and magnetite, associa- 

 tion of.... 1112 



Cleopatra's Needle, Central Park, New York, effect 



of freezing and thawing on 441-442 



Climate, effect of, on metamorphism 41 



Climatic changes, influence of, on level of ground 



water 424 



Clinochlore, alterations and alteration products 



of- 347-348 



chemical and physical constants of 196,346 



occurrence of _ 346-347 



sources and modes of formation of 344,370,390 



Clinohumite, alterations and alteration products 



of- - 325,373,380,403 



chemical and physical constants of 196,325 



occurrence of _ 325 



Clintonites, alteration and alteration products of. . . 345 



chemical and physical constants of . : 344 



occurrence, sources, and modes of formation 



of. -- --. 344-345 



Clintonitegroup of minerals, character, occurrence, 



formation, and alterations of 344-345 



See also Chloritoid; Margarite; Ottrelite. 



