Silurian Period — Interval of geologic time, 443–417 million years ago. The third period of the Paleozoic Era, the Silurian follows the Ordovician Period and precedes the Devonian. It marks the first appearance of land plants and jawed fishes. The continents were… … Universalium
Mendip Hills — Coordinates: 51°18′N 2°44′W / 51.3°N 2.733°W / 51.3; 2.733 … Wikipedia
Malvern Hills — For the local government district in Worcestershire, see Malvern Hills (district). Malvern Hills Area of Outstanding Natural Beauty Malvern Hills in J … Wikipedia
Cheviot Hills — For the neighborhood of Los Angeles, see Cheviot Hills, Los Angeles. Coordinates: 55°28′41″N 2°09′07″W / 55.478°N 2.152°W / … Wikipedia
Quarries of the Mendip Hills — The Mendip Hills are the most southerly Carboniferous Limestone Upland in Britain and are found in northern Somerset.They are composed of three major anticlinal structures, each with a core of older Devonian sandstone and Silurian volcanic rocks … Wikipedia
Shadow Mountains — The Shadow Mountains are located in the Mojave Desert of eastern California in the United States. The mountains lie in a generally north south direction south of the Kingston Range and east of the Avawatz Mountains and the Silurian Hills.Shadow… … Wikipedia
Geology of Scotland — The geology of Scotland is unusually varied for a country of its size, with a large number of differing geological features. [Keay Keay (1994) op cit page 415.] There are three main geographical sub divisions: the Highlands and Islands is a… … Wikipedia
geochronology — geochronologic /jee oh kron l oj ik/, geochronological, adj. geochronologist, n. /jee oh kreuh nol euh jee/, n. the chronology of the earth, as based on both absolute and relative methods of age determination. [1890 95; GEO + CHRONOLOGY] * * *… … Universalium
Geology of the Australian Capital Territory — Australia grew around three fused pieces of very ancient continental crust (cratons). The geology of the Australian Capital Territory includes rocks dating from the Ordovician around 480 million years ago, whilst most rocks are from the Silurian … Wikipedia
Dumfriesshire — Not to be confused with Dumfriesshire (Scottish Parliament constituency) or Dumfriesshire (UK Parliament constituency). Dumfries County (until circa 1890) … Wikipedia
