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1:250 000 Geological Map

This range of geological maps show the general geology of the area, they come in either folded (for taking on the field), or flat (for wall mounting)
Buy from UKGE

1: 50 000 Geological Map

This range of geological maps show the localised geology, they come in either folded (for taking on the field), or flat (for wall mounting)
Buy from UKGE

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.

 

Geological Guide to Perryfield Quarry

The Portland Stone is well known all over the world as a building stone. The Isle of Portland has quarried this stone for many years and continues to do so today, Perryfield Quarry is a well known quarry on the Island and one which has been going for a considerable length of time. This quarry did close for a while, but re-opened due to the demand for the stone. The stone used in the building of 'Waterloo Bridge' came from this quarry.

The Purbeck Beds are now covered in rubble but once made the top most part of the quarry.

Basal Shell Bed from the Portland Beds of Perryfield Quarry
Blocks of cut Portland Stone with Purbeck rubble in the background.



Berriasian
136 - 141 MYA
H
A
S
T
I
N
G
S

G
R
O
U
P
Early Ashdown Formation
Purbeck
Durlston
Formation
Unio Beds
Broken Shell lst
Chief Beef Beds
Corbula Beds
Scallop Beds
Intermarine Beds
Cinder Beds
Lulworth
Formation
Cherty Freshwater Beds

Freshwater Bay
Church Ope Cove
Perryfield Quarry

Marly Freshwater Beds
Soft Cockle Beds
Hard Cockle Beds
Cypris Freestones
Broken Beds and Caps

Portlandian
142 to 147 MYA
Helmsdale Shale

Helmsdale
Boulder Beds Helmsdale
Portland Stone Freestone Series

Dancing Ledge
West Weare
Freshwater Bay
Church Ope Cove
Perryfield Quarry
Cherty Series
Basal Shell Bed
Portland Sand Portland Clay West Weare
West Weare Sandstone
Exogyra Bed
Upper Blacknore Beds
Blacknore Sandstone
Lower Blacknore Beds

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