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Ruhpolding Formation
The Ruhpolding Formation is a sedimentary formation of the Northern Calcareous Alps deposited during the Upper Jurassic. The open marine radiolarite is very rich in silica. Definitions The Ruhpolding Formation derives its name from its type locality Ruhpolding, a commune in Upper Bavaria situated at the edge of the Northern Calcareous Alps. The type locality, situated southwest of Ruhpolding (at Gschwendlbach near ''Röthelmoos'', ''Urschlau'') is a bad choice as it doesn't show the characteristic red radiolarites found elsewhere in the Austroalpine domain but only grey to red cherty limestones. This is the reason why Gawlik (2000) suggested a new type profile with a complete development of the radiolarite at ''Mörtlbach'' northeast of Hallein. The formation is also known as Ruhpolding Radiolarite or Ruhpolding Beds. In a wider context all the radiolarites of Late Bajocian, Callovian, Oxfordian, Kimmeridgian and Early Tithonian age are reunited within the Ruhpolding Radiol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics ( lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silica
Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula , most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is one of the most complex and most abundant families of materials, existing as a compound of several minerals and as a synthetic product. Notable examples include fused quartz, fumed silica, silica gel, opal and aerogels. It is used in structural materials, microelectronics (as an Insulator (electricity), electrical insulator), and as components in the food and pharmaceutical industries. Structure In the majority of silicates, the silicon atom shows tetrahedral coordination geometry, tetrahedral coordination, with four oxygen atoms surrounding a central Si atomsee 3-D Unit Cell. Thus, SiO2 forms 3-dimensional network solids in which each silicon atom is covalently bonded in a tetrahedral manner to 4 oxygen atoms. In contrast, CO2 is a linear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiemgau Alps
The Chiemgau Alps (german: Chiemgauer Alpen) are a mountain range in the Northern Limestone Alps and therefore belong to the Eastern Alps. Their major part is situated in Bavaria, Germany and only a small section crosses the Austrian border into the states of Salzburg and Tyrol (state), Tirol. They reach their highest elevation (1961 m) in the Sonntagshorn, a peak straddling the German-Austrian border. Geography The Chiemgau Alps stretch from the Inn River in the West to the Salzach River in the East and cover a distance of 60 km in strike direction; their maximum width in North-South direction amounts to about 25–30 km. They are surrounded by the following mountain ranges: * Bavarian Prealps in the West * Kaisergebirge in the Southwest * Leoganger Steinberge in the South * Loferer Steinberge in the Southeast * Berchtesgaden Alps in the Southeast and East Their northern edge often drops off quite drastically to the Alpine foothills, foothills. Major peaks * S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lechtal Alps
The Lechtal Alps (german: Lechtaler Alpen) are a mountain-range in western Austria, and part of the greater Northern Limestone Alps range. Named for the river Lech which drains them north-ward into Germany, the Lechtal Alps occupy the Austrian states of Tyrol and Vorarlberg and are known for their diverse rock structure. The Lechtal Alps are surrounded by the Ötztal Alps, Samnaun Alps and Verwall Alps (south) and the Allgäu Alps (north). Peaks *Parseierspitze, * Dawinkopf, * Südlicher Schwarzer Kopf, * Gatschkopf, * Bocksgartenspitze, *Holzgauer Wetterspitze, * Oberer Bocksgartenkopf, *Vorderseespitze, * Freispitze, * Eisenspitze, *Große Schlenkerspitze, *Fallenbacherspitze The Fallenbacherspitze (also: Fallenbacher Spitze, Fallenbacher-Spitze) in the Austrian state of Tyrol is a 2,723-metre-high rock summit in the Lechtal Alps. Due to its remoteness and lack of signed routes, the mountain is not climbed very often. ..., External links * Mountain rang ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allgäu Alps
The Allgäu Alps (german: Allgäuer Alpen) are a mountain range in the Northern Limestone Alps, located in Bavaria and Baden-Württemberg in Germany and Tyrol and Vorarlberg in Austria. The range lies directly east of Lake Constance. Character The mountain range is characterised by an unusual variety of rock formations and consequently a rich tapestry of landscapes, in particular, the steep " grass mountains" (''Grasberge'') of the Allgäu Alps with gradients of up to 70°. Its flora is amongst the most varied in the whole Alpine region and its accessibility by lifts and paths is outstanding. The mountain paths (''Höhenwege'') running from hut to hut are well known and hikers can spend seven to ten days walking in the mountains without descending to inhabited valleys. Thanks to its location on the northern edge of the Alps, the region has relatively high precipitation and is the rainiest in Germany. In winter the Allgäu Alps – at least in the higher regions – are comparat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lechtal Nappe
The Lechtal is an alpine valley in Austria, the greater part of which belongs to the state of Tyrol and the smaller part to Vorarlberg. The Lech river flows through the valley. Location The valley is bounded geographically by the Lechtal Alps in the south and Allgäu Alps in the north. The upper Lech valley, with its settlements of Zürs am Arlberg and Lech in Vorarlberg, is a well-known ski region, whilst the rest of the valley is rather less well developed for tourism. There are industrial and trading estates, especially in the Reutte Basin. Several side valleys branch off the Lechtal including, on the left-hand side, the Hornbachtal and the Tannheimer Tal. On the right, a road through the ''Namlostal'' links Stanzach with Berwang and Bichlbach. The route through the ''Bschlabertal'' goes to Bschlabs, Boden and over the Hahntennjoch pass to Imst. The ''Gramaistal'' and the Kaisertal are also right-hand, side valleys of the Lechtal. Near Füssen the valley transitions to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tithonian
In the geological timescale, the Tithonian is the latest age of the Late Jurassic Epoch and the uppermost stage of the Upper Jurassic Series. It spans the time between 152.1 ± 4 Ma and 145.0 ± 4 Ma (million years ago). It is preceded by the Kimmeridgian and followed by the Berriasian (part of the Cretaceous).See for a detailed version of the geologic timescale Gradstein ''et al.'' (2004) Stratigraphic definitions The Tithonian was introduced in scientific literature by German stratigrapher Albert Oppel in 1865. The name Tithonian is unusual in geological stage names because it is derived from Greek mythology. Tithonus was the son of Laomedon of Troy and fell in love with Eos, the Greek goddess of dawn. His name was chosen by Albert Oppel for this stratigraphical stage because the Tithonian finds itself hand in hand with the dawn of the Cretaceous. The base of the Tithonian stage is at the base of the ammonite biozone of '' Hybonoticeras hybonotum''. A global reference profi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kimmeridgian
In the geologic timescale, the Kimmeridgian is an age in the Late Jurassic Epoch and a stage in the Upper Jurassic Series. It spans the time between 157.3 ± 1.0 Ma and 152.1 ± 0.9 Ma (million years ago). The Kimmeridgian follows the Oxfordian and precedes the Tithonian. Stratigraphic definition The Kimmeridgian Stage takes its name from the village of Kimmeridge on the Dorset coast, England. The name was introduced into the literature by French geologist Alcide d'Orbigny in 1842. The Kimmeridge Clay Formation takes its name from the same type location (although this formation extends from the Kimmeridgian stage of the Upper Jurassic into the Lower Cretaceous). It is the source for about 95% of the petroleum in the North Sea. Historically, the term Kimmeridgian has been used in two different ways. The base of the interval is the same but the top was defined by British stratigraphers as the base of the Portlandian (''sensu anglico'') whereas in France the top was defined as t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxfordian (stage)
The Oxfordian is, in the ICS' geologic timescale, the earliest age of the Late Jurassic Epoch, or the lowest stage of the Upper Jurassic Series. It spans the time between 163.5 ± 1.0 Ma and 157.3 ± 1.0 Ma (million years ago). The Oxfordian is preceded by the Callovian and is followed by the Kimmeridgian. Stratigraphic definitions The Oxfordian Stage was called "Clunch Clay and Shale" by William Smith (1815–1816); in 1818 W. Buckland described them under the unwieldy title "Oxford, Forest or Fen Clay". The term Oxfordian was introduced by Alcide d'Orbigny in 1844. The name is derived from the English city of Oxford, where the beds are well developed, but they crop out almost continuously from Dorset to the coast of Yorkshire, generally forming low, broad valleys. They are well exposed at Weymouth, Oxford, Bedford, Peterborough, and in the cliffs at Scarborough, Red Cliff and Gristhorpe Bay. Rocks of this age are found also in Uig and Skye. The base of the Oxfordian Stage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callovian
In the geologic timescale, the Callovian is an age and stage in the Middle Jurassic, lasting between 166.1 ± 4.0 Ma (million years ago) and 163.5 ± 4.0 Ma. It is the last stage of the Middle Jurassic, following the Bathonian and preceding the Oxfordian. Stratigraphic definitions The Callovian Stage was first described by French palaeontologist Alcide d'Orbigny in 1852. Its name derives from the latinized name for Kellaways Bridge, a small hamlet 3 km north-east of Chippenham, Wiltshire, England. The base of the Callovian is defined as the place in the stratigraphic column where the ammonite genus ''Kepplerites'' first appears, which is the base of the biozone of '' Macrocephalites herveyi''. A global reference profile (a GSSP) for the base had in 2009 not yet been assigned. The top of the Callovian (the base of the Oxfordian) is at the first appearance of ammonite species '' Brightia thuouxensis''. Subdivision The Callovian is often subdivided into three substages ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bajocian
In the geologic timescale, the Bajocian is an age and stage in the Middle Jurassic. It lasted from approximately 170.3 Ma to around 168.3 Ma (million years ago). The Bajocian Age succeeds the Aalenian Age and precedes the Bathonian Age. Stratigraphic definitions The Bajocian Stage takes its name from the Latin name (Bajocae) of the town of Bayeux, in the region of Normandy in France. The stage was named and introduced in scientific literature by French palaeontologist Alcide d'Orbigny in 1842. The base of the Bajocian stage is defined as the place in the stratigraphic column where fossils of the ammonite genus ''Hyperlioceras'' first appear. A global reference profile (a GSSP) for the base is located at Murtinheira, close to Cabo Mondego in Portugal.The GSSP is described by Pavia & Enay (1997) The top of the Bajocian (the base of the Bathonian) is at the first appearance of ammonite species ''Parkinsonia convergens''. Subdivision The Bajocian is often divided into Lower/Early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
