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The Llano Uplift is a low geologic dome that is about 90 miles (140 km) in diameter. It consists of an island-like exposure of Precambrian igneous and metamorphic rocks surrounded by outcrops of Paleozoic and Cretaceous sedimentary strata. At their widest, the exposed Precambrian rocks extend about 65 miles (105 km) westward from the valley of the Colorado River and beneath a broad, gentle topographic basin drained by the Llano River. The subdued topographic basin is underlain by Precambrian rocks and bordered by a discontinuous rim of flat-topped hills. These hills are the dissected edge of the Edwards Plateau, which consist of overlying Cretaceous sedimentary strata. Within this basin and along its margin are down-faulted blocks and erosional remnants of Paleozoic strata which form prominent hills.
Caerphilly is a county borough in southern Wales, straddling the ancient county boundary between Glamorgan and Monmouthshire. It is governed by Caerphilly County Borough Council.
Dorset is a county in South West England on the English Channel coast. Covering an area of 2,653 square kilometres (1,024 sq mi); it borders Devon to the west, Somerset to the north-west, Wiltshire to the north-east, and Hampshire to the east. The great variation in its landscape owes much to the underlying geology which includes an almost unbroken sequence of rocks from 200 Ma to 40 Ma and superficial deposits from 2 Ma to the present. In general the oldest rocks appear in the far west of the county, with the most recent (Eocene) in the far east. Jurassic rocks also underlie the Blackmore Vale and comprise much of the coastal cliff in the west and south of the county; and although younger Cretaceous rocks crown some of the highpoints in the west, they are mainly to be found in the centre and east of the county.
The Geological Conservation Review (GCR) is produced by the UK's Joint Nature Conservation Committee and is designed to identify those sites of national and international importance needed to show all the key scientific elements of the geological and geomorphological features of Britain. These sites display sediments, rocks, minerals, fossils, and features of the landscape that make a special contribution to an understanding and appreciation of Earth science and the geological history of Britain, which stretches back more than three billion years. The intention of the project, which was devised in 1974 by George Black and William Wimbledon working for the Governmental advisory agency, the Nature Conservancy Council (NCC), was activated in 1977. It aimed to provide the scientific rationale and information base for the conservation of geological SSSIs (Sites of Special Scientific Interest, protected under British law. The NCC and country conservation agencies were established in 1990 when JNCC became established and took over responsibility for managing the GCR site assessment process, and publishing accounts of accepted sites.
Saltern Cove is a Site of Special Scientific Interest. It is on the coast of Tor Bay, south of Paignton, Devon, England. It is one of the coves which make up the local area known as "Three Beaches".
The Fossil Grove is a group of fossils located within Victoria Park, Glasgow, Scotland. It was discovered in 1887 and contains the fossilised stumps and roots of eleven extinct Lepidodendron trees, which are sometimes described as "giant club mosses" but are more closely related to quillworts. The Fossil Grove is managed as a museum and has been a popular tourist attraction since it opened for public viewing in 1890.
Mynydd Machen is a 362-metre-high (1,188 ft) hill lying between the town of Risca and the village of Machen in Caerphilly County Borough in south Wales. Its summit is crowned by a trig point and a mast.
The Marros Group is the name given to a suite of rocks of Namurian age laid down during the Carboniferous Period in South Wales. These rocks were formerly known as the Millstone Grit Series but are now distinguished from the similar but geographically separate rock sequences of the Pennines and Peak District of northern England and northeast Wales by this new name.
The geology of Monmouthshire in southeast Wales largely consists of a thick series of sedimentary rocks of different types originating in the Silurian, Devonian, Carboniferous, Triassic and Jurassic periods.
Allt Penycoed Stream Section is a Site of Special Scientific Interest in Carmarthen & Dinefwr, Wales. It is protected by law and has been designated as an SSSI since April 1985 in an attempt to protect rare or unique features or species within it. The site has an area of 1.62 hectares and is managed by Natural Resources Wales.
Cwm Twrch is a Site of Special Scientific Interest (SSSI) in Carmarthenshire, Wales.
Aberbargoed Grasslands is a Site of Special Scientific Interest in the Rhymney Valley in Mid & South Glamorgan, South Wales. The area was designated a national nature reserve in 2012 largely due to its population of marsh fritillary butterflies. It is managed by Caerphilly County Borough.
Southerndown Coast is a Site of Special Scientific Interest (SSSI) in St Brides Major community, in the Vale of Glamorgan, South Wales. It forms part of the Glamorgan Heritage Coast, bordered by the Monknash Coast to the southeast. The nearby villages are Southerndown and Ogmore-by-Sea. The SSSI extends over 5 kilometres of south-west facing coastline, with rocky limestone cliffs, broad beaches and deeply fissured wave-cut platforms.
Wern Ddu Claypits is a Site of Special Scientific Interest near Van in Caerphilly County Borough, South Wales. The woodland is known locally as Coed y Werin, which surrounds a 19th-century clay pit, dug to supply clay to the Caerphilly Brick Company. It is designated because of the important coal measure rocks exposed there.
The geology of Merseyside in northwest England largely consists of a faulted sequence of Carboniferous Coal Measures rocks overlain in the west by younger Triassic and Permian age sandstones and mudstones. Glaciation during the present Quaternary Period has left widespread glacial till as well as erosional landforms. Other post-glacial superficial deposits such as river and estuarine alluvium, peat and blown sand are abundant.
The Bluefield Formation is a geologic formation in West Virginia. It preserves fossils dating back to the Mississippian subperiod of the Carboniferous period. Sediments of this age formed along a large marine basin lying in the region of what is now the Appalachian Plateau. The Bluefield Formation is the lowest section of the primarily siliciclastic Mauch Chunk Group, underlying the Stony Gap Sandstone Member of the Hinton Formation and overlying the limestone-rich Greenbrier Group.
Sliabh an Iarainn, formerly Sliabh Comaicne, is a large hill in County Leitrim, Ireland. Its present form evolved from the southwest movement of ice age glaciers over millions of years, the morainic drift heaping thousands of drumlins in the surrounding lowlands. Irish cultural folklore records strong association with the mythological "Tuatha De Dannan". Sliabh an Iarainn is an important natural heritage site with exposed marine and coastal fauna of paleontological interest
Brunton Bank Quarry is a disused quarry now designated as a Site of Special Scientific Interest (SSSI) in Northumberland, North East England. The quarry exposes a base layer of the Namurian Great Limestone stratigraphic unit, including the Chaetetes Band, the fossilised fauna within which is of current geological interest.
Grace Dieu and High Sharpley is an 86 hectare biological and geological Site of Special Scientific Interest between Coalville and Shepshed in Leicestershire. Grace Dieu Quarry is a Geological Conservation Review site.
Seaham Quarry is a heritage-listed former quarry and now geological site at Torrence Street, Seaham, Port Stephens Council, New South Wales, Australia. It was added to the New South Wales State Heritage Register on 2 April 1999.
References
- ↑ C.J. Cleal; B.A. Thomas (2013). British Upper Carboniferous Stratigraphy. Springer Science & Business Media. ISBN 9401105871 . Retrieved 23 March 2020.
- ↑ "APPENDIX 5: STATUTORY PROTECTED SITES FOR BIODIVERSITY CONSERVATION". Caerphilly County Borough Council. Retrieved 23 March 2020.