GREEN OR CHLORITE SAND. 69 



VIIL 



§1.4. Green or Chlorite Sand. 



Syn. Phillips' Outlines of Mineralogy and Geology, p. 199- — Smith's 

 Strata, p. 12. — Professor Buckland's Order of Superposition of the British 

 Islands. 



The term green sand, in its limited sense, is employed to designate 

 certain strata of siliceous sand and sandstone, which compose the upper 

 division of the " Green Sand Formation," and are interposed between the 

 Weald clay and the lower beds of the chalk. A considerable portion of 

 the sand " contains little round masses of a green substance, having a near 

 resemblance to chlorite, and which sometimes are so abundant as to 

 give a green tinge to the aggregate of wliich they form a part : from this 

 circumstance, the deposit has also been distinguished by the name of 

 " Chlorite Sand.'" This substance, however, has not been chemically 

 examined, and very probably may prove to be a suboxide of iron *." 



In its course through Sussex, the green sand varies so much in its ex- 

 ternal appearance, physical characters, and mineral contents, that its out- 

 crop is traced with difficulty. The strata comprised in this division, 

 admit of the following synoptical arrangement, viz. 



GREEN SAND. 



C Thick beds and concretions of chert, (provincially termed whinstone,) 

 \ with veins of chalcedony. 



White sand and sandstone. 



Red sand. - 



Green sand. 



Passing into iron sand, and containing concretions of ironstone. 



Alternating with, and passing into soft grey sandstone. 



* Phillips' Outlines. 



