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Sedimentary rocks Deposited from water. 



Septaria calcareous concretions, divided by irregular lines of carbonate of 

 lime into septa or chambers. 



Siphuncle A tube passing through the septa of concamerated shells, to enable 

 the animals to rise and sink in the water. 



Stratum a bed or deposite distinct from another bed. 



Stratified deposites formed by beds lying upon and usually parallel to each 



other. 

 Strike the direction of the edges of beds at right angles to their dip, as we 



say to strike off\n any given direction. 



Synclinal where the beds converge towards each other in concave lines. 

 Talus a slope at the foot of an escarpment, formed of the fallen materials. 

 Unconfarmablebeds whose planes do not conform in parallelism to each other, 

 Unstratified amorphous masses, without any appearance of stratification . 

 Zoophytes animals producing coral rocks. 



