Buckover Road Cutting
Encyclopedia
Buckover Road Cutting is a 1.7 hectare
geological Site of Special Scientific Interest near the town of Thornbury, South Gloucestershire
, notified in 1967.
The site shows an unconformity
between Silurian
rocks and quartz
conglomerate
of the Devonian
period.
Hectare
The hectare is a metric unit of area defined as 10,000 square metres , and primarily used in the measurement of land. In 1795, when the metric system was introduced, the are was defined as being 100 square metres and the hectare was thus 100 ares or 1/100 km2...
geological Site of Special Scientific Interest near the town of Thornbury, South Gloucestershire
Thornbury, South Gloucestershire
Thornbury is a market town in South Gloucestershire, England, approximately 12 miles north of the city of Bristol, with a population of 12,342 at the 2001 UK census. The town hosts South Gloucestershire Council headquarters and is twinned with Bockenem in Germany. Thornbury is a Britain in Bloom...
, notified in 1967.
The site shows an unconformity
Unconformity
An unconformity is a buried erosion surface separating two rock masses or strata of different ages, indicating that sediment deposition was not continuous. In general, the older layer was exposed to erosion for an interval of time before deposition of the younger, but the term is used to describe...
between Silurian
Silurian
The Silurian is a geologic period and system that extends from the end of the Ordovician Period, about 443.7 ± 1.5 Mya , to the beginning of the Devonian Period, about 416.0 ± 2.8 Mya . As with other geologic periods, the rock beds that define the period's start and end are well identified, but the...
rocks and quartz
Quartz
Quartz is the second-most-abundant mineral in the Earth's continental crust, after feldspar. It is made up of a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall formula SiO2. There are many different varieties of quartz,...
conglomerate
Conglomerate (geology)
A conglomerate is a rock consisting of individual clasts within a finer-grained matrix that have become cemented together. Conglomerates are sedimentary rocks consisting of rounded fragments and are thus differentiated from breccias, which consist of angular clasts...
of the Devonian
Devonian
The Devonian is a geologic period and system of the Paleozoic Era spanning from the end of the Silurian Period, about 416.0 ± 2.8 Mya , to the beginning of the Carboniferous Period, about 359.2 ± 2.5 Mya...
period.
External links
- English Nature citation sheet for the site (accessed 9 July 2006)