PALEOLITHIC

 FLINT 
 IMPLEMENTS 
 IN 
 KENT. 
 291 
 

affords,

 however, 
 better 
 evidence 
 of 
 glacial 
 action. 
 This 
 gravel, 
 which 
 

consists

 in 
 greater 
 part 
 of 
 perfectly 
 angular 
 and 
 unrolled 
 white 
 flints, 
 

with

 a 
 few 
 Tertiary 
 pebbles, 
 and 
 occasionally 
 with 
 fragments 
 of 
 chert, 
 

is

 unstratified, 
 and 
 looks 
 as 
 though 
 it 
 had 
 been 
 forced 
 down, 
 irregu- 
 

larly

 as 
 it 
 were, 
 into 
 the 
 underlying 
 Gault, 
 by 
 pressure 
 from 
 above. 
 

The

 flints 
 are 
 often 
 pitted 
 or 
 pock-marked. 
 The 
 section, 
 however, 
 

at

 Park-Farm 
 brick-pit 
 is 
 small 
 and 
 insufficient. 
 This 
 gravel 
 is 
 

better

 developed 
 and 
 possesses 
 more 
 distinctive 
 characters 
 in 
 other 
 

parts

 of 
 the 
 Holmesdale 
 valley, 
 and 
 I 
 will 
 therefore 
 reserve 
 the 
 fuller 
 

account

 of 
 it 
 to 
 a 
 future 
 occasion, 
 when 
 I 
 shall 
 be 
 able 
 to 
 give 
 more 
 

definite

 reasons 
 for 
 its 
 origin. 
 

I

 showed 
 *, 
 many 
 years 
 ago, 
 that 
 the 
 great 
 trough 
 or 
 valley 
 of 
 

Holmesdale,

 in 
 which 
 this 
 drift 
 has 
 been 
 deposited, 
 is 
 of 
 more 
 

recent

 date 
 than 
 the 
 extensive 
 spread 
 of 
 " 
 red 
 clay 
 with 
 flints 
 " 
 

which

 lies 
 on 
 the 
 top 
 of 
 the 
 chalk 
 hills. 
 Consequently 
 the 
 brown- 
 

stained

 flint- 
 drift, 
 which 
 has 
 now 
 been 
 traced 
 to 
 the 
 edge 
 of 
 the 
 

escarpment,

 where, 
 like 
 the 
 red 
 clay, 
 it 
 suddenly 
 ends, 
 together 
 

probably

 with 
 the 
 associated 
 rude 
 flint 
 implements, 
 must 
 also 
 be 
 of 
 

older

 date 
 than 
 the 
 valley, 
 and 
 therefore 
 anterior 
 to 
 the 
 Postglacial 
 

"river-drifts"

 of 
 these 
 tributaries 
 of 
 the 
 Medway 
 and 
 the 
 Thames 
 

valleys,

 which 
 lie 
 in 
 them. 
 I 
 have 
 also 
 shown 
 f 
 that 
 there 
 has 
 been, 
 

at

 a 
 time 
 probably 
 before 
 that 
 of 
 the 
 northern 
 drift 
 or 
 Boulder-clay 
 

series,

 a 
 drift 
 from 
 the 
 south 
 which 
 carried 
 the 
 chert 
 and 
 ragstone 
 of 
 

the

 Lower 
 Greensand 
 across 
 the 
 chalk-escarpment 
 into 
 the 
 Thames 
 

valley

 — 
 not 
 in 
 the 
 line 
 of 
 the 
 present 
 river-valleys, 
 but 
 traversing 
 

the

 high 
 chalk 
 plain, 
 and 
 capping 
 the 
 summit 
 of 
 some 
 of 
 the 
 higher 
 

hills

 in 
 the 
 London 
 basin. 
 Still 
 it 
 seems 
 not 
 to 
 be 
 universally 
 

distributed,

 but 
 to 
 keep 
 to 
 certain 
 lines, 
 springing 
 from 
 the 
 lower, 
 

but

 still 
 high, 
 points 
 or 
 gaps 
 in 
 the 
 chalk-escarpment 
 J. 
 Amongst 
 

the

 drift-capped 
 hills 
 of 
 the 
 Thames 
 valley 
 is 
 that 
 of 
 Swanscombe 
 

Wood,

 51 
 miles 
 north 
 of 
 Ash, 
 and 
 306 
 ft. 
 § 
 above 
 J). 
 It 
 consists 
 

of

 an 
 outlier 
 of 
 London 
 Clay, 
 with 
 a 
 capping 
 of 
 this 
 southern 
 drift, 
 

which

 there 
 consists, 
 according 
 to 
 a 
 note 
 I 
 made 
 some 
 years 
 ago 
 

of

 a 
 small 
 shallow 
 section 
 then 
 existing 
 by 
 the 
 Old 
 Telegraph, 
 of 
 : 
 — 
 

Tertiary

 flint 
 pebbles 
 (Woolwich 
 beds). 
 

Subangular

 fragments 
 of 
 brown 
 chert 
 ... 
 1 
 

„

 „ 
 of 
 bright 
 red 
 chert 
 . 
 Lower 
 Greensand. 
 

,,

 „ 
 of 
 yellow 
 ragstone 
 J 
 

Subangular

 flints, 
 not 
 coloured. 
 

Flints,

 much 
 rolled 
 and 
 worn 
 and 
 stained 
 deep 
 brown. 
 

Green-coated

 flints 
 (Thanet 
 Sands). 
 

The

 above 
 are 
 placed 
 in 
 the 
 order 
 of 
 their 
 relative 
 abundance. 
 

The

 brown 
 and 
 red 
 cherts 
 are 
 from 
 the 
 Lower 
 Greensand 
 of 
 the 
 

 "On 
 the 
 Origin 
 of 
 the 
 Sand 
 and 
 Gravel 
 Pipes 
 in 
 the 
 Chalk," 
 &c, 
 Quart. 
 

Journ.

 Geol. 
 Soc. 
 vol. 
 xi. 
 p. 
 73 
 (1854). 
 

t

 Eeports 
 Brit. 
 Assoc. 
 York, 
 1881, 
 p. 
 621. 
 

I

 Thus 
 far 
 this 
 brown 
 flint-drift 
 appears 
 to 
 be 
 generally 
 associated 
 with 
 rude 
 

flint

 implements 
 ; 
 but 
 the 
 inquiry 
 is 
 yet 
 new 
 and 
 needs 
 more 
 extended 
 obser- 
 

vations.

§

 This 
 is 
 220 
 ft. 
 above 
 the 
 high-level 
 terrace 
 of 
 implement-bearing 
 river- 
 

gravel

 at