Both JC 1.3A and JC 1.3B as a single two-sided block. This shows exceptional preservation on side A as this block was preserved as a layer of iron pyrites. This was the upper surface and was winnowed out to leave only a few larger stem fragments. The lower surface is totally covered by whole crinoid stems with calyx attached.
Size: 300 mm by 200 mm
Size: 300 mm by 200 mm