72 
Tlie accoinpcanying table shows the strata which are here 
present in the cliff, and which, as far as Ave can ascertain from 
Avell-horings in the neighbourhood, probably underlie it. 
Tabular List of Strata present in Gorton Cliff, and in 
ALL PROBABILITY UNDERLYING IT. 
Boulder Clay— Upper Glacial \ 
Sand and Gravel — l\Iiddle Glacial j 
Brickcartli } aiad.1 
raveU I 
) } Tertiary or Cainozoic. 
Sand and Gravel 
Forest Series (so called) 
London Clay 
Woolwich and Reading Beds 
Chalk 
1 Eocene 
Cretoceozis— S econdary or Mesozoic. 
/ 
I he clay with chalk nodules, flints, and more occasional fragments 
of rocks brought from a distance, Avhich we call Boulder Clay, the 
stratified sands below Avith their fragmentary marine shells, and 
the brick clay or till beneath them, belong to the Glacial period. 
Underlying these are some beds from Avhich have been abundantly 
obtained the remains of a group of animals, differing altogether from 
any Avhich noAv exist in Europe, and differing also, though not to 
so great an extent, from any representative forms Avhich still 
inhabit other regions of the Avorld. Associated Avith these bones 
and teeth there occurs a quantity of A'egetable dchris, such as tree 
stumps and fossil Avood, Avhich has given to this deposit the some- 
Avhat inappropriate name of the Forest-bed. All these strata, from 
the Boulder Clay at the surface of the cliff to the so-called Forest- 
bed at its base, I class as belonging to the Pliocene* or (next to 
our oAvn) most recent portion of the Tertiary series. 
Underlying the Forest-bed, as presumably proved by Avell-borings 
at Yarmouth, Ave liaA'c deposits belonging to the Eocene, or earliest 
Tertiary formation. They are the London Clay and Woolwich 
beds, probably several hundred feet in thickness. 
* I folloAV those geologists avIio object to the use of such terius as 
Quaternary, Post-Tertiary, or Post-Pliocene, as misleading and unnecessary. 
