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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. |
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Geological Guide to Hookend Cliff
Geological succession at Hookend Cliff
The middle chalk makes up the uppermost beds at Hookend Cliff, this being of the Terebratulina lata Zone and the Inoceramus labiatus (Orbirhynchia cuvieri) Zone. This chalk is the most fossiliferious, but is only accessible from fallen blocks.
Most of the cliff at Hookend to Beer comprises of the lower chalk is part of the Beer Limestone Formation of the Hooken Nodular Limestone Bed, Cenomanian age. This is a complex thin sequence of bedded coarse calcareous sandstone, bioclastic limestone, calcarenite and shell-detrital limestone, with a distinct nodularity and well-developed hardgrounds. Glauconitic and phosphatic.
In the lowest part of the cliff at Hookend, is the Upper Greensand which can also be seen on the foreshore during scouring.
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