1852.] 



BROWN UPPER TERTIARIES AT COPFORD. 



185 



Fig. 1 . — Diagram showing the relations of the Freshwater Beds of 

 the Copford Brickfield. 



N, " Eastern Section." " Southern Section." S. 



Red gravel. 



Brown clay with pebbles, &c. 



Brown sandy loam. 



Shell-marl and ferruginous sands (furrowed surface). Bones and shells. 



The same, passing into clay, rich with shells. 



Vegetable bed. 



4". Yellow and blue clays, laminated. 

 5. Grey sandy gravel. 

 5'. Sandy gravel. 



Shells. 



Bones and shells. 



Shells and drifted fossils. 



In digging through the bed No. 4 of the section (fig. 1), the 

 workmen meet with a bed of sand and gravel (No. 5), with cal- 

 careous concretions, rounded chalk-debris, flints, both rounded and 

 angular, boulders of lias, and other rock-fragments. This bed is 

 very rich in fragments oi Ammonites, Ostrece, &c., and organic remains 

 (for the most part small) derived from the tertiary and secondary 

 formations. 



Drifted Organic Remains from the Tertiary and Secondary 

 Formations, 



Lias, 



Belemnites acutus. 

 Avicula inaequivalvis. 



Oolite. 



Large fragment of bone, impregnated 



with iron pyrites. 

 Belemnites. 

 Rissoa. 

 Trochus. 

 Perna. 



Ostreae and Grypheae (small). 

 Millericrinus ? {Goldfuss, pi. 78. f. 7t 



and 7 X) and others (.-' Oolitic). 

 Echinodermata (spines). 

 Fish teeth. 



Littorina carinata. 



Belemnites attenuatus. 



minimus. 



Inoceramus sulcatus. 



Plagiostoma spinosum. 

 Inoceramus (fragments). 

 Ostreae (small). 

 Terebratulina striata. 

 gracilis. 



Greensand. 



Gault. 



Chalk. 



Nucula. 

 Pentacrinus Briareus. 



Spirolina (Oxford Clay). 



Chemnitzia „ 



Ammonites ornatus „ 



Lamberti „ 



Mariae „ 



biplex (Kim. Clay). 



spinosus ,, 



Aptychus „ 



Exogyra virgula „ 

 Pleurotomaria „ 

 Serpula (Cornbrash). 



Serpula. 



Frondicularia. 

 Crustacean remains. 

 Fish teeth. 



RhynconeUa Mantelliana. 



Cuvieri. 



Crania Egnabergensis. 

 Serpula granulata and others. 

 Apiocrinus ellipticus (ossicles). 



