Those who live in Herefordshire will be familiar with the red sandstone used in many smaller buildings, locally quarried but easily eroded. The geology of the county is rather more complex; a study project called A Thousand Years of Building with Stone, which finished in 2017, was run by the Herefordshire & Worcestershire Earth Heritage Trust helped to clarify the position. The project covered both Herefordshire and Worcestershire. Various 'clusters ' in the county were identified to act as representatives of the local building stone, visits were made to inspect the stone in situ and this was matched with historical information to identify  the quarries used at different periods. The Resources tab has a list of useful websites and articles e.g. The Human Cost of getting Stone and a report on the use of stone in one of the clusters - Notes on buildings,  building stone and quarries in in Goodrich, Herefordshire by Rosalind Lowe