The Geology of Judy Woods

The rocks underlying West Yorkshire were formed in the Carboniferous period, some 310 million years ago. At that time, Britain was somewhere near the equator and the area was low-lying, hot and wet. The coastal lowlands had swamps and deltas which from time to time were inundated by the sea, until the deltas built up again and the swamps reformed.
The rocks formed in these environments were all sedimentary in origin - deposited in layers of mud and sand. Vast forests provided lots of carbonaceous material, which subsequently became coal. Also in these sediments are occasional lumps and bands of ironstone, which became the raw materials for the iron industry during the Industrial Revolution.
Not many of these rocks are exposed in Judy Woods, except along the banks of the beck, which has cut a deep valley into the landscape. However, at the southern end of the woods, the beck side is accessible, and the sandstones, shales, ironstones and thin coal seams can be seen, entering the woods from the style entrance on Station Road. Unfortunately there are few fossils in these beds, but occasionally, plant remains and a few fossilised shells can be found.