GEOLOGY AND PALEONTOLOGY OF THE SCHOHARIE VALLEY 307 



lime rubblerock — a rock composed of broken or worn fragments or pebbles 



of limestone or organic fragments (shells, corals etc.) ; also called 



calcirudyte 

 lime sandrock — a rock made up of lime sand ; also called calcarenyte 

 lines of growth — the lines on the shell marking the progressive increase 



in size 

 lithic — pertaining to the nature of rock 

 living chamber — the last and largest chamber of the cephalopod shell, in 



which the animal lives 

 lutaceous — of an impalpable or mudlike grain invisible to the eye 

 lobe — the backward projecting portion of the suture line in the Goniatites 



and Ammonites 

 lobes, of glabella — the parts of the glabella of the trilobite isolated by the 



various depressions or furrows. They comprise anterior, lateral and 



posterior 



marginal rim — in trilobites the rim surrounding the front of the head 



shield 

 master stream — the principal stream of the region 

 metamorpliic — altered; there are three types of metamorphism : static, or 



by a process of aging ; dynamic, or by disturbing forces as mountain 



folding, etc. ; thermic, or by contact with heated bodies as dikes, flows 



or sills 

 monadnock — an erosion remnant projecting above the level of a peneplain 

 moniliform — beadlike 

 moraine, ground — the material carried along frozen into the bottom of a 



glacier and deposited on the melting of the ice 

 mould, external — the impression made by a shell or other body in the sand 



or mud in ^Vhich it is buried — impression of exterior 

 mould, internal — the impression received by the sand or mud filling a shell 



or other hollow — impression of interior 

 mucronate — having slender projecting ends 

 mudcracks — the cracks formed by the drying up of beds of mud. They 



commonly surround polygonal plates 

 mural pores — the pores in the walls of the corallites of Favosltes and re- 

 lated forms 

 muscular impressions, muscular scar — scars on interior of shells, etc. 



made by attachment of the opening and closing muscles 



nasute — noselike 



nautilicone — coiled shell with whorls impressing each other as in Nautilus 

 nautiloid — resembling or related to Nautilus 

 noded — bearing knobs or nodes 



noncoiling — not possessing, or losing the power to coil 

 uonmarine — not formed by deposition in the sea — continental 

 nonumbilical — not having a hollow or depression at the base of the axis 

 of coiling (umbilicus) 



obsequent stream — streams flowing down the inface of the cuesta in the 



direction opposite to that of the consequent streams 

 occipital spine — spine on the basal or occipital ring of the head of trilobites 



