24 relations: Cambrian, Community (Wales), Countryside and Rights of Way Act 2000, Diabase, Dike (geology), Fault (geology), Freedom to roam, Gwynedd, Hill, Igneous rock, Intrusive rock, Mawddach Group, Mineralization (geology), Mudstone, Ordnance Survey, Quartz, Sandstone, Sedimentary rock, Siltstone, Till, Tonalite, Trawsfynydd, Wales, Welsh language.
The Cambrian Period was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon.
A community (cymuned) is a division of land in Wales that forms the lowest tier of local government in Wales.
The Countryside and Rights of Way Act 2000, known as the CRoW Act is a United Kingdom Act of Parliament affecting England and Wales which came into force on 30 November 2000.
Diabase or dolerite or microgabbro is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro.
A dike or dyke, in geological usage, is a sheet of rock that is formed in a fracture in a pre-existing rock body.
In geology, a fault is a planar fracture or discontinuity in a volume of rock, across which there has been significant displacement as a result of rock-mass movement.
The freedom to roam, or "everyman's right", is the general public's right to access certain public or privately owned land for recreation and exercise.
Gwynedd is a county in Wales, sharing borders with Powys, Conwy, Anglesey over the Menai Strait, and Ceredigion over the River Dyfi.
A hill is a landform that extends above the surrounding terrain.
Igneous rock (derived from the Latin word ignis meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic.
Intrusive rock (also called plutonic rock) is formed when magma crystallizes and solidifies underground to form intrusions, for example plutons, batholiths, dikes, sills, laccoliths, and volcanic necks.
The Mawddach Group is a middle to upper Cambrian lithostratigraphic group (a sequence of rock strata) in Gwynedd, Wales.
In geology, mineralization is the deposition of economically important metals in the formation of ore bodies or "lodes" by various process.
Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds.
Ordnance Survey (OS) is a national mapping agency in the United Kingdom which covers the island of Great Britain.
Quartz is a mineral composed of silicon and oxygen atoms in a continuous framework of SiO4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO2.
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) mineral particles or rock fragments.
Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and within bodies of water.
Siltstone is a sedimentary rock which has a grain size in the silt range, finer than sandstone and coarser than claystones.
Closeup of glacial till. Note that the larger grains (pebbles and gravel) in the till are completely surrounded by the matrix of finer material (silt and sand), and this characteristic, known as ''matrix support'', is diagnostic of till. Glacial till with tufts of grass Till or glacial till is unsorted glacial sediment.
Tonalite is an igneous, plutonic (intrusive) rock, of felsic composition, with phaneritic texture.
Trawsfynydd (Welsh for "across mountain") is a village in Gwynedd, Wales, adjacent to the A470 north of Bronaber and Dolgellau near Blaenau Ffestiniog.
Wales (Cymru) is a country that is part of the United Kingdom and the island of Great Britain.
Welsh (Cymraeg or y Gymraeg) is a member of the Brittonic branch of the Celtic languages.