Oxford Clay

Oxford clay or the Oxfordian beds, are the lowest subdivision of the Upper Jurasssic rocks. Their outcrop stretches from Weymouth, past Swindon, Oxford and Bedford, into North Yorkshire. In its typical deleopment it is 150 meters or more in thickness, blue or grey in colour, and contains thin layers of limestone and many septarian nodules.

Related terms:

• brown clay ironstone
• red clay
• varved clay