GEOLOGY 01? THE AVON BASIN. 



3. — Flexures and FauUa. 

 The osaontial :fon,tnrcs to bo noted in the geological strnc- 

 turo seem to be the following : 



1. The normal strata of the Portislicad-Clovodon ridgo 

 thrown into their present position by the greater Clapton 

 Fault (see Tortbury and Clapton District, p. 12). Tlie beds 

 dip gently at an angle of 30° or less S.S.B. They may bo 

 seen on the coast-lino S.W. of Woodhill Bay, and in the 

 largo quarry at Wood Hill. 



2. Along a lino to the S.E. of this, marked by a dotted 

 lino on the map, tho strata are highly inclined. They dip 

 78° N.W. in the large quarry near tlio N. end of the line, 

 70° N.W. near tho station, 75° N.W. in tho lane to the N. 

 of Pore Hill, 40° S. in the lane to tho south of that hill, 

 and 80° S.E. in a (piarry to the south of the Mountain 

 Limestone of Weston Wood. 



3. This line, however, crosses Fore Hill, in which tho 

 Mountain Limestone dips getitly 18° S.E. 



4. North of Wood Hill is a depression occupied by Dolo- 

 mitic Conglomerate. On the coast, however, and in the 

 quarry to tho west of tho hill. Lower Limestone Shales are 

 seen contorted, and appear to mark tho axis of an anticlinal. 



5. North, of this depression is the Mountain Limestone 

 ridge, running from i'ortishead (Battery) Point to tho 

 landing-stage. The beds are nearly vortical, but near 

 Battery Point dip about r)0° N.l<]. 



6. North-oast of this ridge, just appearing on tho coast, 

 and overlain to a largo extent by Dolomitio Conglomerate, 

 are beds of red Coal Measure Sandstone. With a N.W. 

 to S.E. strike they dip at high angles N.E. and S.W. 



7. Overlying Triassio beds, which do not hero call for 

 particular notice. 



