C-13/C-12 1,782 C-14 3,587 Calibration 674 Canada--Alberta 652 Canada--Arctic Archipelago 588 Canada--British Columbia 723 Canada--Northwest Territories 997 Canada--Northwest Territories--Franklin District 676 Canada--Quebec 658 Canada--Yukon Territory 910 Carbon 7,697 Carbonate rocks 580 Carbonates 657 Carbon cycle 1,279 Carbon dioxide 3,582 Carbon isotopes 4,849 Carnivora 584 Cartography 827 Case studies 1,078 Cements 625 Cenozoic 26,513 Channels 774 Channels (waterways) 1,249 Chemical analysis 1,217 Chemical composition 4,789 Chemical ice prevention 1,015 Chemical properties 1,103 Chlorophyll 812 Chlorophylls 886 Chondrites 602 Chordata 4,326 Circulation 1,573 Classification 1,229 Classifications 3,038 Clastic rocks 1,683 Clastic sediments 7,745 Clay 833 Clay minerals 562 Clays 1,351 Clay soils 894 Climate 7,425 Climate change 12,836 Climate--Cycles and trends 853 Climate effects 3,012 Climate forcing 879 Climatic change 12,493 Climatic changes 2,371 Climatic factors 1,865 Climatology 2,676 Cloud cover 760 Cloud droplets 620 Cloud physics 2,331 Clouds 2,524 Clouds (meteorology) 2,186 Coastal environment 1,418 Coastal topographic features 1,376 Cold tolerance 712 Cold weather construction 3,451 COLD WEATHER CONSTRUCTION 657 Cold weather operation 1,598 Cold weather performance 1,699 Cold weather survival 833 Cold weather tests 752 Communities 796 Composition 926 Compressive properties 1,117 Computer applications 4,468 Computerized simulation 1,611 Computer programs 1,272 Concentration 2,665 Concrete admixtures 765 Concrete durability 860 Concrete freezing 960 Concretes 777 Concrete strength 1,122 Concrete structures 1,112 Coniferales 586 Conservation 2,392 Construction 2,693 Construction equipment 830 Construction materials 2,081 Continental drift 1,013 Continental margin 1,094 Continental shelf 2,086 Convection 1,088 Cooling 1,055 Cores 4,604 Correlation 2,910 Cost analysis 1,325 Countermeasures 2,877 Cracking (fracturing) 594 Creep 821 Cretaceous 1,606 Crust 1,471 Crustacea 1,286 Cryobiology 782 Cryogenic soils 2,395 Current research 1,117 Currents 2,814 Cycles 1,074