Geological Timeline, Jurassic - showing detailed stratigraphy for each period

Charmouth - Sinemurian

Kimmeridge Bay - Kimmeridgian

Grafham Water - Oxford Clay

Brora - Callovian

Watton Cliff - Forest Marble

Elgol - Bathonian

Burton Bradstock - Aalenian

Watchet - Hettangian

Jurassic

GEOGRAPHY AND CLIMATE: Gondwanaland continues to break up, Graywacke, shale and siliceous sediments formed. Continued mountain building. mild, moist climates over most of the land.

TERRESTRIAL ANIMAL LIFE: Reptiles dominant with Crocodiles, turtles, lizards and dinosaurs. Pterosaurs and Archaeopteryx take to the air. Mammals begin to diversify. More advanced insects such as flies.

PLANT LIFE: Cycads, ginkos, conifers, ferns and tree ferns.

SEA LIFE: All major invertebrate groups well represented, ammonites and bivalves successful. Marine reptiles, Ichthyosaurs are Plesiosaurs.

British Stratification Tables
Updated and correct from 2004 MYA=Million Years Ago from present

Portlandian 142 to 147 MYA
Purbeck	Lulworth Formation	Cherty Freshwater Beds	Freshwater Bay Church Ope Cove Portland Bill Poxwell Quarry Lulworth Cove
		Marly Freshwater Beds
		Soft Cockle Beds
		Hard Cockle Beds
		Cypris Freestones
		Broken Beds and Caps
Helmsdale Shale			Helmsdale
Boulder Beds			Helmsdale
Portland Stone	Freestone Series		Dancing Ledge West Weare Freshwater Bay Church Ope Cove Portland Bill
	Cherty Series
	Basal Shell Bed
Portland Sand	Portland Clay		West Weare
	West Weare Sandstone
	Exogyra Bed
	Upper Blacknore Beds
	Blacknore Sandstone
	Lower Blacknore Beds

Kimmeridgian 150 to 154 MYA
Boulder Beds	Lothbeg Crakaig Helmsdale Portgower
Allt na Cuile Sandstone	Lothbeg
Kintradwell Beds	Lothbeg Crakaig Kintradwell
Three Kings Reef	Balintore
Eathie Shore	Eathie
Kimmeridge Clay	Reighton Osmington Mills Wyke Regis Ringstead Kimmeridge Bay West Weare

Oxfordian 154 to 159.4 MYA
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 Water Cayton Bay Osmington Mills Weymouth
Lower Calcareous Grit Formation	Saintoft Member	Filey
Lower Calcareous Grit Formation	Tenants Cliff Member	Cayton Bay

Callovian 159 to 165 MYA
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 Cayton Bay
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

Bathonian
165 to 170 MYA

Brora Coal Formation	Brora Coal	Brora Brora River Balintore
	Bituminous Shale	Brora Brora River
	Clays, Brecciated Sands and Cementstones
	White Sandstone

Early Cornbrash
Forest Marble			Burton Bradstock Watton Cliff
Frome Formation			Burton Bradstock Watton Cliff
Wattonensis Beds
Fullers Earth			Burton Bradstock West Bay
Zigzag Beds
Lealt Shale Formation		Lonmfearn Member	Elgol
		Dark grey fissile mudstone	Elgol
		Kildonnan Member	Elgol
		Gey fissile siltstone	Elgol
		Stromatolitic algal limestone	Elgol
Elgol Sandstone Formation			Elgol
Ravenscar Group	Scalby Formation	Long Nab Member	Scalby Ness

Bajocian
170 to 177 MYA

Late Inferior Oolite			Burton Bradstock West Bay Bearreraig Bay
Middle Inferior Oolite			Burton Bradstock West Bay
Ravenscar Group	Scalby Formation	Moor Grit Member	Gristhorpe Scalby Ness
	Scarborough Formation		Cloughton Wyke Gristhorpe Ravenscar
	Cloughton Formation	Gristhorpe Member	Cloughton Wyke Ravenscar
		Lebberston Member	Cloughton Wyke Ravenscar
		Yons Nab Beds	Gristhorpe
		Sycarham Member	Cloughton Wyke Ravenscar
Dogger Formation			Saltwick Bay Sandsend Whitby Ravenscar
Bearreraig Sandstone Formation		Garantiana Shale Member	Glasnakille Faoilean
		Dark grey fissile mudstone

Aalenian
177 to 180.1 MYA

Early Inferior Oolite		Burton Bradstock West Bay Horn Park Quarry
Scissum Beds		Burton Bradstock West Bay
Bridport Sands		Burton Bradstock West Bay
Bearreraig Sandstone Formation	Druim an Fhuarain Sandstone Member	Glasnakille Faoilean
Ravenscar Group	Eller Beck Formation	Hayburn Wyke Ravenscar
Ravenscar Group	Saltwick Formation	Saltwick Bay Whitby Hayburn Wyke Sandsend Ravenscar

Toarcian 190 - 195 MYA
L A T E L I A S	Early Bridport Sands		Thorncombe Beacon West Bay
	Down Cliff Clay		Eype Golden Cap (Seatown) Thorncombe Beacon
	Junction Bed		Eype Thorncombe Beacon
	Blea Wyke Formation	Yellow Sandstone Member	Ravenscar
	Blea Wyke Formation	Grey Sandstone Member	Ravenscar
	Whitby Mudsone Formation	Fox Cliff Sandstone Member	Ravenscar
		Peak Mudstone Member	Ravenscar
		Alum Shale Member	Kettleness Whitby Saltwick Bay Runswick Bay Sandsend Ravenscar
		Mulgrave Shale Member	Port Mulgrave Kettleness Whitby Saltwick Bay Runswick Bay Ravenscar
		Grey Shale Member	Port Mulgrave Kettleness Whitby Saltwick Bay Runswick Bay Ravenscar

Pliensbachian 190 - 195 MYA
M I D D L E L I A S	Marlstone Rock
	Thorncombe Sands		Eype Thorncombe Beacon
	Margaritatus Beds
	Down Cliff Sands		Eype Thorncombe Beacon
	Eype Clay		Charmouth Eype Golden Cap (Seatown) Thorncombe Beacon
	Three Tiers		Charmouth Golden Cap (Seatown)
E A R L Y L I A S	Green Ammonite		Charmouth Golden Cap (Seatown)
	Belemnite Stone		Charmouth Golden Cap (Seatown)
	Belemnite Marls		Charmouth Lyme Regis
	Cleveland Ironstone Formation	Kettleness Member	Port Mulgrave Staithes Runswick Bay Kettleness
		Penny Nab Member	Port Mulgrave Staithes Runswick Bay
	Staithes Sandstone Formation		Staithes Ravenscar Robin Hoods Bay
	Late Redcar Mudstone Formation	Ironstone Shales	Staithes Robin Hoods Bay
		Pyritous	Robin Hoods Bay

Sinemurian 195 - 201 MYA
E A R L Y L I A S	Middle Redcar Mudstone Formation	Siliceous Shales	Robin Hoods Bay
		Late Calcareous Shales	Robin Hoods Bay
	Black Ven Marls		Charmouth Lyme Regis
	Shales with Beef		Charmouth Lyme Regis
	Late Blue Lias		Charmouth Lyme Regis Quantoxhead Kilve Chippel Bay

Hettangian 201 to 205.7 MYA
E A R L Y L I A S	Early Blue Lias		Watchet Lilstock Hinkley Point Quantoxhead Kilve Chippel Bay Doniford Bay St Audries Bay Blue Anchor
	Redcar Mudstone Formation	Early Calcareous Shales

Dunrobin Bay Formation	Lady's Walk Shale	Golspie
	White Sandstone	Golspie
	Carbonaceous Siltstone	Golspie

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