Explanation of y jme Geological Terms used in this Report, 



Anticlinal where the beds dip contrariwise, like slates on 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 locks 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. 



Gonialttesa. chambered shell, with a siphuncle, spirally striated, resembling 

 the ammonite and nautilus. 



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



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



having their origin from water. 

 Lignites carbonated fossil wood. 



Mural escarpment perpendicular cliff's, presenting a section, of beds \ik& a wall. 

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



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

 once formed a part. 



Radiaria animals including echinites, encrinites, &c. 



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



Section when the edges of a series of be,d,s 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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