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FOSSIL CRINOID STEMS ('SCREWSTONE') - 300 million years old - Ukraine

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Home > FOSSILS > FOSSILS FROM THE PRECAMBRIAN AND PALAEOZOIC ERAS


STEMS OF CRINOIDS (SEA LILIES)
('SCREWSTONE')
 
300 million years old
 
Donieck, Ukraine
 
This attractive and unusual form of fossil preservation is a result of the original fossil being dissolved by groundwater percolating through the rock leaving the original sediment-filled hole in the centre of the stem intact. 
 
These fossils resemble screws although they do not have a helical thread.  For this reason they were once known as 'screwstones'. 

Click on a picture for a larger image


Size: 7 x 7 x 5 centimetres
Weight: 238 grams

PRICE: £28.00
FOSSIL CRINOID STEMS ('SCREWSTONE')  - 300 million years old - Ukraine
FOSSIL CRINOID STEMS ('SCREWSTONE')  - 300 million years old - Ukraine FOSSIL CRINOID STEMS ('SCREWSTONE')  - 300 million years old - Ukraine FOSSIL CRINOID STEMS ('SCREWSTONE')  - 300 million years old - Ukraine FOSSIL CRINOID STEMS ('SCREWSTONE')  - 300 million years old - Ukraine