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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 |
Cretaceous
GEOGRAPHY AND CLIMATE: Seas flood half the land, Great thickness of
chalk, single-celled animals laid down. Land masses
begin to move towards their present positions. Climate mild without
extremes.
TERRESTRIAL ANIMAL LIFE: Advanced dinosaurs such as duck-bills. Turtles,
snakes,salamanders. Gulls and wading birds. Opossums & other mammals.
All dinosaurs and many other large reptiles extinct by the end of
the period.
PLANT LIFE: Gymnosperms, sequoias and cypresses. Flowering plants appear,
magnolias and oaks.
SEA LIFE: Plankton, coral reefs, rudists, ammonites, calcareous algae.
Marine reptiles and ammonites extinct by the end of the period.
Triassic
GEOGRAPHY AND CLIMATE: Sea levels very low. Graywacke shale, siliceous and Red desert sandstone deposits, arid climate over most of land Pangaea begins to split. Atlantic Ocean opens up.
TERRESTRIAL ANIMAL LIFE: Reptiles dominant, including the ancestors of the dinosaurs and mammals.
PLANT LIFE: Gymnosperms such as ferns, cycads, gingko's and conifers.
SEA LIFE: Ammonites dominate the seas, Bivalves and Brachiopods are locally abundant but generally rare. All other major invertebrate groups are rare of missing.
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Geological Guide to Seaton
Seaton Upper Chalk
The upper chalk at Seaton is particularly interesting for the Holaster planus Zone, the chalk extends to Beer Head where it is the most western crop of Upper Chalk.
Seaton Upper Greensand (Right, with Upper Chalk on Left)
Seaton is ideal for collecting from the Upper Greensand as the entire series can be seen, the foreshore is full of various greensand rocks and some from the Cherty Beds.
Seaton Red Rocks
At Seaton, the red cliffs just before the chalk are part of the Triassic and are the 'New Red Rocks'. The New Red Rocks are part of the 'New Red Sandstone Series'. These are unfossiliferious.
Upper Greensand
Santonian
83 - 86 MYA |
Newhaven Group |
Old Nore |
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Brighton Marl |
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Splash Point |
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Buckle Marls |
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| Micraster cortestudinarium Zone |
Beer Head
Pinhay Bay |
| Holaster (Sternotaxis) planus Zone |
Beer Head
Pinhay Bay
Seaton |
Seaford Chalk |
Haven Brow |
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