Grafham - Geological Guide for the Geology and Stratification

(Oxford clay Exposed in banks and on foreshore) - 2004

At Grafham Water, the Boulder Clay overlain's the Oxford Clay.

Jurassic	Late	Volgian	Portlandian	Berriasian	142 to 147
			Tithonian
					147 to 150
		Kimmerianidg		Late	150 to 154
				Early
		Oxfordian	Corallian		154 to 159.4
			Late Oxford Clay
	Middle	Callovian	Middle Oxford Clay		159 to 165
			Early Oxford Clay
			Kellaways
			Late Cornbrash
		Bathonian	Early Cornbrash		165 to 170
			Forest Marble
			Frome Formation
			Wattonensis Beds
			Fullers Earth
			Zigzag Beds
		Bajocian	Late Inferior Oolite		170 to 177
			Middle Inferior Oolite
		Aalenian	Early Inferior Oolite		177 to 180.1
			Scissum Beds
			Bridport Sands
	Early	Toarcian (Late Lias)			180 to 190
		Pliensbachian (Middle and Early Lias)			190 to 195
		Sinemurian (Early Lias)			195 to 201
		Hettangian (Early Lias)			201 to 205.7

Oxfordian 154 to 159.4 MYA
FORMATIONS AND DEPOSITS		LOCATIONS
Balintore Formation	Ardassie Limestone	Brora Balintore
Brora Arenaceous Formation	Brora Sandstone	Brora
Corallian		Balintore Osmington Mills Bowleaze Cove Weymouth
Corallian Oolite Formation	Passage Beds Member	Filey
	Hambleton Oolite Member	Filey
	Birdsall Calcareous Grit Member	Filey
	Hambleton Oolite Member	Filey
Oxford Clay Formation		Grafham Cayton Bay Weymouth
Lower Calcareous Grit Formation	Saintoft Member	Filey
Lower Calcareous Grit Formation	Tenants Cliff Member	Cayton Bay

Callovian 159 to 165 MYA
FORMATIONS AND DEPOSITS		LOCATIONS
Brora Arenaceous Formation	Clynelish Quarry Sandstone	Brora
	Fascally Sandstone	Brora

Brora Argillaceous Formation	Fascally Siltstone	Brora Brora River
	Brora Brick Clay	Brora Brora River
	Glauconitic Sandstone	Brora Brora River
	Brora Shale	Brora Brora River
	Brora Roof Bed	Brora Brora River

Middle Oxford Clay Formation		Grafham Water
Early Oxford Clay Formation		Gristhorpe Cayton Bay
Kellaways
Cayton Clay Formation		Cayton Bay
Fleet Member
Abbotsbury Cornbrash Formation		Gristhorpe Cayton Bay
Osgodby Formation	Hackness Rock Member	Gristhorpe
	Langdale Member	Gristhorpe
	Redcliff Rock Member	Gristhorpe Cayton Bay

1:250 000 Geological Map of Grafham Water
Geological Maps are sold either Flat or Folded for Solid, or Seabed geology. Special editions may be available for certain locations. For a complete list click the link below.
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1: 50 000 Geological Map of Grafham
Geological Maps are sold either Flat or Folded for Solid, Drift or combined geology. Special editions may be available for certain locations. For a complete list of
1: 50 000 maps, click the link below.
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