Neuropteris heterophylla Brongniart.
Split nodule showing well preserved seed fern fronds. Both positive and negative halves. Nice preservation and detail under magnification. From the famous locality of Crock Hay now sadly infilled and grassed over.
Carboniferous, Westphalian, Duckmantian, shales above the Wigan 9 foot Coal.
Crock Hay Opencast near Wigan, Lancashire.
Nodule : 5.5 x 4.5 cm.
