384 GLOSSARY. 



CALAMINES, a genus of fossil plants. 



CALCAREOUS, limy, containing lime. 



CAMPOPHYLLUM, a genus of fossil corals. 



CEPHALOPODA, the highest class of mollusks. 



CHiET^ i ES, a genus of fossil corals. 



CHERT, coarse, fragmentary, flinty material. 



CHOM VTODUS, a genus of fossil fishes. 



CHONETES, a genus of fossil bivalve shells. 



CLADODUS, a genus of fossil fishes. 



CO/\L -FIELD, a region in which coal is, or may be found. 



COAL-MEASURES, (see page 231.) 



CONFORMABLE STRATA, those lying parallel upon each other. 



CONGLOMERATE, pebbles and sand consolidated into rock. 



CONIFER, a sub-class of plants, including the pines and cedars. 



CRANIA, a genus of shells. 



CREHiK, a name commonly applied in America to small tributaries of rivers. 



CRETACEOUS, chalky, the formation of the same geological age as the chalk 



of Europe. 

 CRINOIDS, a family of radiates, related to the star-fishes. 

 CRUS FACEANS, an order of animals, including lobsters, crabs, crayfish, etc. 

 CRYPTAOANTHIA, a genns of fossil bivalve shells. 

 CYATHOPHYLLUM, a genus of fossil corals. 

 CYRTIA, a genus of fossil bivalve shells. 

 CYTHERE, a genus of minute crustaceans. 

 CYTHERINA, a genus of minute crustaceans. 



DEBRIS, broken or comminuted fragments of rocks. 



DELTODUS, a ger.us of fossil fishes. 



DENUDATION, the wearing away of some portions of strata, or deposits from 



the principal portion. 

 DETKITUS, fragments, or comminuted material worn from rocks. 

 DILUVIAL, pertaining to floods. 

 DISCINA, agenns of shells. 

 DOLOMITE, magnesian limestone. 

 DRIFT, the deposits which contains the boulders 

 DRIFTING, (a miner's term), digging a way horizontally into or within a 



mine. 

 DREPANACANTHUS, a genus of fossil fishes. 



ESCARPMENT, a steep or precipitous exposure of strata. 

 EUOMPHALUS, a genus of fossil univalve shells. 



FAULT, an abrupt break in the continuity of strata, by elevation or depression 



upon one side or the other of the break. 

 FAUNA, (as used in geology), all the animal remains of a formation, group or 



system. 



