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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 |
Devonian
GEOGRAPHY AND CLIMATE: Gondwanaland still in Southern Hemisphere, Eurasia and North America lie in the tropics, Shale's, Slates and Old Red sandstones laid down as continents flood during warm, dry climate.
TERRESTRIAL ANIMAL LIFE: Flightless insects, spiders and the first amphibians.
PLANT LIFE: Primitive, large spore-bearing plants from the first forests Horsetails, club mosses appear.
SEA LIFE: Horn Corals, Brachiopods, ammonites, Crinoids, conodonts and Trilobites. The age of Fish's, jaws and jawless bony fish, armoured fish, lobe-fin fish and cartilaginous fish all abundant. |
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Geological Guide to Croyde
Baggy Beds at Croyde
The rocks at Croyde are from the Devonian age. Sandstones and Siltstones are embedded within the Baggy Beds at Baggy Point. These beds are interbedded brown and grey fine-grained sandstones, siltstones and greenish-grey shaly mudstones with thicker buff, fine- and medium-grained feldspathic and micaceous sugary sandstones. Trace fossils and wave action can be identified within these rocks. At Baggy point, thin crinoidal and gastropodal limestones can be seen with Lingula.
Continuing towards Woolacombe, the Pickwell Down beds become present from the middle Famennian age. At the base of this bed between the Pickwell Down Beds and Baggy Beds, a tuff band layer can be seen known as the 'Bittadon Felsite', the Pickwell Down Beds themselves are marked by over 4000ft of red, brown, purple and green sandstones with some shale.
Famennian
354 - 364 MYA |
U
P
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R
R
E
D
S
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N
D
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N
E |
Pilton Mudstone Formation |
Pilton Shales |
Fremington |
| Baggy Sandstones Formation |
Baggy Beds |
Croyde
Woolacombe |
| Pickwell Down Sandstones Formation |
Pickwell Down beds |
Croyde
Woolacombe |
| Balnagown Group |
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| Portishead Beds |
Portishead |
| Tintern Sandstone |
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| Dunnet Head Sandstone Group |
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