Polished building stone: Ordovician fossilferous and bioturbated rock - #6
The large curved cephalopod fossil, with a transverse segmented/ribbed pattern, spans about 15 cm (top to bottom). The dark grey linear and irregular mottle shapes are dolomitized burrows in this limestone rock.
For examples of other fossils and more scientific details, see the captions/explanations for my other photos of this rock type (Tyndall stone), in my "Geology in building stone" album.
C. J.R. Devaney
Polished building stone: Ordovician fossilferous and bioturbated rock - #6
The large curved cephalopod fossil, with a transverse segmented/ribbed pattern, spans about 15 cm (top to bottom). The dark grey linear and irregular mottle shapes are dolomitized burrows in this limestone rock.
For examples of other fossils and more scientific details, see the captions/explanations for my other photos of this rock type (Tyndall stone), in my "Geology in building stone" album.
C. J.R. Devaney