Other Areas
- Gloucestershire's oldest rocks occur at Chase End hill in the extreme north-west of the county, where Precambrian hornblende-gneiss of the Malvern Group forms the southern end of the Malvern Hills before plunging under the Triassic cover.
- Poorly exposed Cambrian shales of Tremadoc age form an inlier extending from the Tortworth area (between Gloucester and Bristol) northwards to Tites Point on the River Severn. The Silurian is also represented in the Tortworth area, with rocks outcropping along a continuation of the Malvern fault belt south of the Severn.
- Carboniferous rocks give rise to the Bristol Coalfield in south-west Gloucestershire.
Read more about this topic: Geology Of Gloucestershire
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