Open questions: South Gloucestershire

Where sources disagree, MineArchive keeps both accounts rather than picking one; where a fact could not be settled, the record says so. 7 such claims on 3 records. All regions.

Cromhall Quarry

• The limestone is the Gully Oolite and Black Rock Limestone, around 350 million years old. (disputed)
• The fissures of red Triassic Magnesian Conglomerate lie in the Friars Point Limestone. (disputed)
• Quarrying began in 1840, for the quartzitic Upper Cromhall Sandstone. (uncertain)
• Quarrying ceased in 1998 and the quarry flooded naturally. (uncertain)

Shortwood Colliery

• The BGS mine-plans catalogue holds a Mining Remediation Authority abandonment plan titled 'Shortwood' (catalogue WM452, Two Feet & Randles, dated 1970); the catalogue gives no location and the plan's details do not clearly tie it to this working, so it may belong to another of the same name. (uncertain)

Yate Celestine Mines

• The Bristol Mineral and Land Company Limited was established in 1910 as a brokerage. (disputed)
• The Bristol Mineral & Land Company was formed in 1912. (disputed)