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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 Osmington Mills
Bran Point, showing separation of Bencliff Grit and Osmington Oolite
Trigonia Clavellata Formation, The Red Bed
The cliffs at Osmington are well known for their excellent sections of Corallian beds and Kimmeridge Clay. Landslips of the Cretaceous Cenomanian Basement bed are often seen. West of Osmington Mills the upper part of the Corallian and the lower Kimmeridge clay is more frequent and at Black head, a full sequence of Kimmeridge Clay from the basal beds to levels above the White Stone Band can be observed.
East of the slipway from the car park at Osmington Mills, Northe Grit forms the lower cliffs.
At the lowest cliff point, a waterfall over the Preston Grit is quite famously landmarked.
Walking East, the Qualicosta Bed forms a ledge west of Bran Point, from here, a fault brings the Middle White Oolite bed against the Pisolite. Still walking East, the Trigonia beds can be seen in the cliffs which dip to beach level.
Osmington Oolite Nodule bed
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