CODE,DESCRIPTION
96,CORNBRASH
97,OXFORD CLAY AND KELLAWAYS BEDS
106,CHALK (INCLUDING RED CHALK)
109,"BARTON, BRACKLESHAM AND BAGSHOT BEDS"
76,LOWER DEVONIAN
98,CORALLIAN
99,KIMMERIDGE CLAY
75,LOWER OLD RED SANDSTONE (INCLUDING DOWNTONIAN)
91,LOWER LIAS
92,MIDDLE LIAS
93,UPPER LIAS
94,INFERIOR OOLITE
95,GREAT OOLITE
100,PORTLAND BEDS
101,PURBECK BEDS
89,PERMIAN AND TRIASSIC SANDSTONES - UNDIFFERENTIATED
108,LONDON CLAY
83,UPPER WESTPHALIAN (C+D)
115,"NORWICH CRAG, RED CRAG AND CHILLESFORD CLAY"
81,"NAMURIAN (""MILLSTONE GRIT SERIES"")"
90,TRIASSIC MUDSTONES
80,"TOURNAISIAN AND VISEAN (""CARBONIFEROUS LIMESTONE SERIES"")"
82,LOWER WESTPHALIAN (A+B)
105,UPPER GREENSAND AND GAULT
104,LOWER GREENSAND
86,MAGNESIAN LIMESTONE
78,UPPER DEVONIAN AND UPPER OLD RED SANDSTONE
79,BASAL CONGLOMERATE
34,"GRANITE, SYENITE, GRANOPHYRE AND ALLIED TYPES"
85,"PERMIAN BASAL BRECCIAS, SANDSTONES AND MUDSTONES"
111,HAMSTEAD BEDS AND BEMBRIDGE MARLS
102,HASTINGS BEDS
103,WEALD CLAY
107,"OLDHAVEN, BLACKHEATH, WOOLWICH AND READING AND THANET BEDS"
84,"WESTPHALIAN AND ? STEPHANIAN, UNDIVIDED OF ""BARREN RED"""
71,ASHGILL
70,CARADOC
31,ULTRABASIC ROCK
32,GABBRO AND ALLIED TYPES
75-8,DEVONIAN UNDIFFERENTIATED
81-3,UPPER CARBONIFEROUS UNDIFFERENTIATED
77,MIDDLE DEVONIAN (ENGLAND)
70-71,ASHGILL AND CARADOC UNDIFFERENTIATED
72,LLANDOVERY
30,"GNEISS, MICA SCHIST"
102-5,LOWER CRETACEOUS - UNDIFFERENTIATED
77-8,MIDDLE/UPPER DEVONIAN UNDIFFERENTIATED
37,"RHYOLITE, TRACHYTE, FELSITE, ELVANS, AND ALLIED TYPES"
61,TORRIDONIAN SANDSTONE AND GRIT
74,LUDLOW
82-3,WESTPHALIAN
94-5,OOLITE - UNDIFFERENTIATED
98-9,AMPTHILL AND KIMMERIDGE CLAY
1,UNDIFFERENTIATED GNEISS OF THE LEWISIAN COMPLEX
60,PRECAMBRIAN
110,"BOVEY FORMATION, ST AGNES SANDS, ETC."
112,LENHAM BEDS
113,CORALLINE BEDS
114,ST ERTH BEDS (CORNWALL)
66,"UPPER CAMBRIAN, INCLUDING TREMADOC"
65,MIDDLE CAMBRIAN
64,LOWER CAMBRIAN
64-6,CAMBRIAN
73,WENLOCK
87,PERMIAN MUDSTONES
88,BUDLEIGH SALTERTON PEBBLE BEDS
69,LLANDEILO
68,LLANVIRN AND ARENIG
35,"BASALT, DOLERITE, CAMPTONITE AND ALLIED TYPES"
78-80,CARBONIFEROUS/DEVONIAN TRANSITION GROUP
50,"DEVONIAN ANDESITIC AND BASALTIC LAVAS AND TUFFS, UNDIFF."