| Here is a particularly rich trilobite plate with the sapecies Parabolina spinulosa from the Upper Cambrian of North Wales. This piece is in a real trilobite cluster. The largest Parabolina on this piece measures around 24 mm. Partly the rim and the spikes have been mineralized as pyrite. This piece comes with a positive and negative side as well. On the smaller plate, the trilobites are predominantly preserved as positives. | |||
Location: | Afon Mawwddach, Dolgella, north Wales | ||
| Size Plates: | about 158 x 130 mm & 110 x 54 mm | ||
| Age: | Upper Cambrian, Dolgella series, , P. spinulosa Zone (about 400 mill. y.o.) | ||