36 



and Old Eed Sandstone ; the waters of the Severn now taking 

 the place of the New Eed Marls and Lias, and is still the 

 denuder and destroyer of the Eocks we have to elucidate in 

 this notice. 



A line drawn from Greenlay Point on the west, to East Brent on 

 the east, describes a line of coast unparalled as regards Physical 

 Structure and Geological intricacy in the Lower Secondary Eocks 

 of Britain ; the lowest known exposed secondary deposit within 

 the area is the Bunter Sandstone and the so called Dolomitic 

 Conglomerate which flanks the older series of the Quantocks, 

 Exmoor, and Mendips. Nowhere are these seen on the coast, the 

 Gypsiferous or new Eed Marls only of this series are exposed in the 

 cliffs east and west of Watchett, and which are again thinly 

 covered west of Doniford by patches of the Ehsetic series and 

 Lower Lias. East of the brook which then flows into the sea, 

 occurs an unexampled section of Upper New Eed, Ehsetic, and 

 Lower Lias in one continuous series, all conformable, and ha-dng 

 one dip to the south-west. The entii-e section measures 295 feet 

 to be hereafter described. From St. Audrey's Slip to Quantocks 

 Head, the coast is entirely occupied by the New Eed Marl, an 

 extensive fault at Quantocks Head throws down the Lias to the 

 base of the Bucklandi and Lima Beds; and these abut against the 

 New Eed, the anticlinal being seen on the shore, then follows 

 along the coast the finest succession of the Lower Lias I know; 

 being indeed a continuation in sequence of the Doniford beds ; 

 93 feet of the Bucklandi series are here shown in succession, 

 Lima gigantea, j. Hermannii, Gryphsea arcuata, Ehynchonella 

 vai'iabilis, Ammonites angulatus, Ammonites Bucklandi, Am. 

 Conybeari and other characteristic Lower Lias species occur 

 abundantly at the base. At the top of this series the beds are 

 faulted, and many apparently lost; then follow 13 beds of 

 Ai-gillaceous Lias (Cement Beds) in all 30 feet tliick, these are 

 succeeded by 50 feet of pale, yellow, and grey Argillaceous 

 Limestones, poor in fossils, then at a low angle of dip 200 feet 

 of Shales and Limestones are exposed, occupying a long shore 

 line. A succession of faults (4) destroys all true sequence 

 upwards, as far as Kilve Pill. 



