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Explanation of y jme Geological Terms used in this Report. 



Anticlinal where the beds dip contrariwise, like slates op the opposite sides 

 of the roof of a house. 



Brachiopoda molluscous animals inhabiting certain shells, with spiral arms, 

 serving the purpose of locomotion. 



Conformable beds whose planes or faces conform in parallelism to each other. 



Conglomerate rocks formed of fragments of older rocks, usually rounded 

 into the pebble form by the action of water. 



Cleavage lines in slates and other rocks which resemble the lines of stratifica 

 tion, but which run in a different direction. The intervention of a 

 siliceous seam, or sometimes the position of fossils, will determine doubt 

 ful cases. 



Formation a bed or group of beds, deposited at an epoch independent of that 

 during which the beds it lies between were deposited. 



Goniatftes a chambered shell, with a siphuncle, spirally striated, resembling 

 the ammonite and nautilus. 



Ichthyodorulites defensive fin bones of an extinct shark-like species offish. 



Jgnigenous rocks having their origin from fire, in contradistinction to those 

 having their origin from water. 



Lignites carbonated fossil wood. 



Mural escarpment perpendicular cliffs, presenting a section of beds }ike a wall. 



Nacre the brilliant iridiscent appearance on the surface of some shells. 



Out-tier mass of rock detached from the general formation of which it 

 once formed a part. 



Radiana animals including echinites, ericriniles, &.c. 



flock all beds, whether hard or soft, are, in geology, included in this term. 



Sec/zon -when the edges of a series of bqcjs show themselves on the banks of a 

 river, or in any escarpment, as if the formation had been cut through, 

 this is a natural section. Rivers cut through their beds usually by retro 

 cession. 



Seam a thin parting between thicker deposites. 

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