22 



GEOLOGICAL STRUCTURE OF SUSSEX. 



Order of Superposition of the Strata of the South-eastern Division of Sussex; 

 Ccommencing trith the lo'west and most ancient Formation. _) 



SECONDARY FORMATIONS. 



Formations. Principal Divisions, 

 f 



GREEN SAND 

 FORMATIONS. 



i. Iron Sand. 



ii. Tilgate Beds. 



Subdivisions. Localities. 



r Fail-light Down^ Dane's Hill, Bright- 

 Sand and sandstone, containing | ling Down, (alt. 616 feet) Crow- 

 layers and concretions of iron--^ borough Beacon, (804 feet alt.) 

 stone. "Wytch Cross, Uckfield, Ashburn- 



L ham, Ashdown Forest, &c. 

 „, „ ,. , ,, ^. -ii, f Hastings, Archer's Wood, near Ash- 



SheUy hinestone.al ernating with ) ^^.^Im, Rotherfield, Framfield 

 beds of blue shale and clay. J Isfield tc i'<"<'ucm. 



Coal and lignite. Bexhill, Newick, Waldron. 



pandstone limestone, and lime--| ^^^^j Handcross, Cuckfield, Til- 

 stone slate, reposing on blue > ^ate ncc ">-«-"ciii, ±u- 



(^ clay. ' S J *• • 



- ^r ^^ ni f^^^'"""'!'""'^-?'""^"^ '^^^ I"''- 1 Tln-oughout the Weald of Sussex, 

 m. Weald, or Oak 7 ing into marl. J ° 



Tree Clay. 



iv. Green Sand. 



fPetworth, West Grinsted, Ditchling 

 \ Common, Plmnpton, Laughton. 



I Petworth, or Sussex marble. 



rContaining thi^ck beds and con- Ynaslemere, Bracksley Heath, Black, 

 cretions of chert, with veins of V .^^ „ ,, n.-.^ „.,, ' '^'^'^^ 



J chalcedony. 

 White sand, and sandstone, 

 Red sand, and sandstone. 

 Green sand. 



down Hill, Tilvester Hill. 



On the Broyle, near Ringmer. 

 Ditchling, NorUngton, &c. 

 f Broyle, Ringmer Park, Beech Wood, 

 \ near Off'ham. 

 Passing into iron sand, and con- f Parham Park, Danny, near Hurst- 



taining concretions of ironstone, \ perpoint. 

 Alternating with and passing into 1 Eastbourne, 

 soft grey sand. J 



§11. 



CHALK 



FORMATIONS. 



§111. 



FORMATIONS 



ABOVE THE 



CHALK. 



V. BlueChalkMarl. 



vi. Grey Chalk 

 Marl. 



vii. Lower Chalk. 



viii. Upper Chalk. 



Druid Sand- 

 stone. 



X. Plastic Clay. 



f IMalra rock. 



\Blue chalk marl or gait. 



chalk marl. 



Western Sussex, near Bignor. 

 Ringmer, Laughton, Harasey, &c. 



} Grey chalk marl. { "Zwns. ^'°"'''""' ■^''' "^ *' 



f AVith very few flints, and harder J Southerhara : forms the lower portion 

 ( than the Upper Chalk. ( of the Downs. 



With numerous beds of flints. The South Downs. 



TERTIARY FORMATIONS. 



r Boulders on the summits, plains, T Lewes Race Course, summits and 

 J and vaUies of the chalk, and.^ valleys of the Downs, Palmer, 



(^ in diluvial beds. (_ Shingle Bed at Brighton. 



f Ferruginous breccia, with peb-1 r>i,-„t- /-■ ti xt i. » 



hies of a greenish colour. j <^h"it>°S Castle, Newhaven, &c. 



< Various beds of sand, marl, and] 



j clay, and of gravel formed of /-Castle Hill, Newhaven. 

 l_^ roUed chalk flints. J 



relay containing fossils, the same j 

 I with those of the Calcaire gros- VBracklesham Bay. 

 xi. London Clay. ■{ «'<;?• of Paris. J 



I Calcareous sandstone containing j -g „, 



l_ green earth. J ° 



