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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 |
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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. |
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Geological Guide to Seatown
At Golden Cap, the Late (Upper) Greensand can be seen from miles around, it even glows in the dark and gave its name to 'Golden Cap'. This and the Gault Clay which is below the greensand makes up the first 60m of the cliff which is of the Cretaceous age.
Below this, 22m of Down Cliff Sands mark the start of the Jurassic Formation. resting on its base is the 'Starfish Bed' whereby fossil starfish can be found, which continues at Thorncombe Beacon, these are more common at Thorncombe Beacon because they are much lower and the beds are slightly thicker.
The Eype Clay takes up 45m of the cliff and contains the Eype Nodule Bed, below this the three tiers and then the Green Ammonite beds making the remaining 34m.
During scouring conditions and on the extreme foreshore, the Belemnite Stone beds can also be seen, yielding a wide range of well preserved Belemnites, ammonites and microfossils. This bed is normally obscured by beach sand during summer months.
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