GEOLOGY. 5 
of the Cyrena bed there, which is seen at the lower portion of the 
section behind the two human figures. 
Sixty years ago the brick-fields at Loampit Hill were much 
resorted to by London geologists for obtaining fossil shells and 
plant remains from the Woolwich beds. In 1904-5 excavations 
for sewers were made in a newly-formed road leading through the 
Bromley Park Estate from the foot of Bromley Hill to Ravens- 
bourne Railway Station. Shells of Cyrena cuneiformis were 
turned out in plenty, also a few of Ostrea bellovacina. We ex- 
amined the blue carbonaceous clay frequently in the hope of finding 
imprints of leaves or stems of plants, but only found a solitary 
impression-of the stem of a reed or sedge. 
The following examples of the thickness of the Woolwich 
beds in our district are recorded in Mr. Whitaker’s books :— 
New Cross Naval School a aes a) 54 ft. 
Brockley... ape ; Sais An Ek 
Lower Sydenham ... aN fae ear tem eA Ont 
Greenwich papel as Sie 334 axe, aa eat 
Eltham fa . : 394 ft. 
The Blackheath fue rest upon die Woolwich beds in our 
district. In some localities they are found to be intercalated, and 
occasionally they even rest directly upon the chalk, probably 
because the Woolwich and Thanet beds had been previously 
carried away. Sections of the Blackheath pebbles and sand were 
formerly exposed in pits on the Heath, and on the sides of Black- 
heath Point, but we fear they have all been hidden by turf. Many 
good sections are, however, now visible in new roads on the 
Kinnaird Park Estate to the east of Bromley Hill, and the Bromley 
Park Estate on the West, also between Ravensbourne and Short- 
lands railway- stations. The sand contains much oxide of iron, 
and the shells of Ostrea and other mollusca afford lime. This 
mineral matter binds the pebbles, sand and shells into masses 
of conglomerate, which was formerly quarried at Sundridge Park, 
Bromley. On the west side of the main road at the foot of 
Bromley Hill, there is an old garden wall appertaining to an 
isolated cottage, which is composed of blocks of it. Again, nearly 
opposite the Ravensbourne railway station, there is a large excava- 
tion, where masses of it are exposed. Occasionally bands of 
light-coloured sand, free from pebbles, also occur. We have seen 
it exposed on the Kinnaird Park Estate, and in the Eltham Golf- 
ground. In 1905 excavations for sewers were in progress in a 
new road opposite to the approach to Well Hall railway station— 
large masses of the conglomerate were then turned out. In some 
instances they. passed into a calcareous sandstone free from 
pebbles. After a few weeks’ exposure the surface of this stone 
crumbled to a powder, and some ardent collectors whom we took 
there obtained from it teeth of sharks of various species. 
Our remarks on the ‘‘solid” geology of the district will 
