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ONCOLITES (COLLECTION OF SEVEN SPECIMENS) - 330 million years old - Northumberland

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Home > FOSSILS > FOSSILS FROM THE PRECAMBRIAN AND PALAEOZOIC ERAS

COLLECTION OF SEVEN CARBONIFEROUS ONCOLITES

Cut and polished to reveal the internal structure

330 million years old
(Carboniferous period)


Spittal, near Berwick-upon-Tweed, Northumberland

Near spherical nodules known as ‘oncolites’ from an algal band in the Carboniferous Limestone.

Oncolites are spherical structures formed by the growth of cyanobacteria (also known as blue-green algae). They are very similar to stromatolites but instead of being dome-shaped, they form spherical nodules. They usually form around a nucleus such as a fragment of shell.

 
Click on a picture for a larger image

Size: 2.5 x 3 x 1 centimetres (average size of nodules)
Weight: 90 grams (all four nodules)

Price for all seven:

PRICE: £35.00
Sorry, this item has been sold or is out of stock
ONCOLITES (COLLECTION OF SEVEN SPECIMENS) - 330 million years old - Northumberland
ONCOLITES (COLLECTION OF SEVEN SPECIMENS) - 330 million years old - Northumberland ONCOLITES (COLLECTION OF SEVEN SPECIMENS) - 330 million years old - Northumberland ONCOLITES (COLLECTION OF SEVEN SPECIMENS) - 330 million years old - Northumberland ONCOLITES (COLLECTION OF SEVEN SPECIMENS) - 330 million years old - Northumberland