Fossils from Abereiddi Beach / "Didymograptus Murchisoni ( Tuning Fork )? and "Diplograptus Multidens" ? / On a shale fragment .
A Graptolite fossil is not the remains of just an individual organism, but a colony of tiny
life forms called zooids / appearing in the early Ordovician period , extinct at the beginning
of the Silurian period / living in the sea, floating near the surface / feeding on microscopic
particles , which they were able to filter out of the water / each tiny "saw tooth" represents
the end of a tube , where a minute sea creature used to live / often called the 'Tuning Fork'
graptolite because of the overall forked appearance of the skeleton / the pointed end at the
top of the 'fork' would have been attached to some sort of float allowing the rest of the
skeleton to hang down in the water
Ref: 8520
Date: 21/04/2011
Location: SM 799 310
