Simplify the following text for a Grade 8 native English-speaking person.
Original: The Oxfordshire Ironstone Railway was a standard gauge mineral railway that served an ironstone quarry near the village of Wroxton in Oxfordshire .
Simplified: The Oxfordshire Ironstone Railway ( the O.I.R. ) was a standard gauge railway that served an ironstone quarry near the village of Wroxton in Oxfordshire .