Tisa Rocks

Last updated
View of the Great Tisa Rocks Tyssaerwaende2.jpg
View of the Great Tisa Rocks
The landmark of Tisa Rocks: "Toadstool & Turtle" Wahrzeichen-Tyssaer-Wande.jpg
The landmark of Tisa Rocks: "Toadstool & Turtle"

The Tisa Rocks or Tisa Walls (Czech : Tiské stěny; German : Tyssaer Wände) are a group of rocks in the Czech Republic. It is located in the western Elbe Sandstone Mountains, not far from its topographical boundary with the Ore Mountains. The region, with its rock pillars up to 30 m high, is one of the major tourist attractions of the region. The Tisa Rocks and the neighbouring Bürschlické Rocks are protected as a nature monument.

Contents

Topography and geology

The Tisa Rocks are located at a height of about 600 m above sea level. They form a line of rock outcrops drawn up in an arc on the westernmost edge of the sandstone beds of the Elbe Sandstone Mountains from the Ore Mountain escarpment on Czech soil. About a kilometre west of them on the outskirts of Tisa stands the coarse- and medium-grained muscovite-biotite-orthogneiss of the Eastern Ore Mountain region. This also strikes eastwards on the hillside south of the village.

The rocks are frequently vertically dissected; in many places the fissures being as deep as the rock pillars are high. Horizontal weathering is found in the upper layers and have created several bizarre shapes, such as the rock called the Steinpilz ("boletus edulis" - a type of edible mushroom) which is easily accessible.

The "Great Tisa Rocks" begin near the official entrance by a restaurant. These consist of a northern and southern array of crags along an otherwise compact plateau. The crags to the west running off at an angle to the northwest are known as the "Little Tisa Rocks". They are more heavily dissected.

The crags of the Tisa Rocks comprise mainly of medium-grained sandstone of the Lower to Middle Turonian of the Cretaceous. They belong lithostratigraphically to the Weissenberg Formation (Bělohorské souvrství) in the Bohemian Cretaceous System. The nearby area surrounding the Tisa Rocks to the north and south is covered by diluvial sediments of loam, sand and boulder-containing scree.

In the sandstone are heavy concentrations of ferrous minerals on closely spaced strata, that can be identified from their yellow to red stripes of colour and predominantly horizontal. A striking feature in many places where the lower strata are visible are small and large cavities as well as occasional tunnels with an oval cross-section, whose walls are often covered with calcareous sinter deposits. These are relics of very old solution processes in the sandstone.

In zones of strong weathering, the marked stratification over short distances is clearly visible. Features associated with cross-bedding occur relatively frequently.

Panorama

Tisa-180deg-Panorama.jpg
Panoramic view from the so-called Great Tisa Wall across the Most Basin with the Central Bohemian Uplands in the background

Sources

50°47′16″N14°1′44″E / 50.78778°N 14.02889°E / 50.78778; 14.02889

Related Research Articles

Sedimentology encompasses the study of modern sediments such as sand, silt, and clay, and the processes that result in their formation, transport, deposition and diagenesis. Sedimentologists apply their understanding of modern processes to interpret geologic history through observations of sedimentary rocks and sedimentary structures.

The Llano Uplift is a geologically ancient, low geologic dome that is about 90 miles (140 km) in diameter and located mostly in Llano, Mason, San Saba, Gillespie, and Blanco counties, Texas. 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.

<span class="mw-page-title-main">Mesa</span> Elevated area of land with a flat top and sides

A mesa is an isolated, flat-topped elevation, ridge or hill, which is bounded from all sides by steep escarpments and stands distinctly above a surrounding plain. Mesas characteristically consist of flat-lying soft sedimentary rocks capped by a more resistant layer or layers of harder rock, e.g. shales overlain by sandstones. The resistant layer acts as a caprock that forms the flat summit of a mesa. The caprock can consist of either sedimentary rocks such as sandstone and limestone; dissected lava flows; or a deeply eroded duricrust. Unlike plateau, whose usage does not imply horizontal layers of bedrock, e.g. Tibetan Plateau, the term mesa applies exclusively to the landforms built of flat-lying strata. Instead, flat-topped plateaus are specifically known as tablelands.

<span class="mw-page-title-main">Saxon Switzerland</span> Hilly natural area in Saxony, Germany

Saxon Switzerland is a hilly climbing area and national park in the Elbe Sandstone Mountains. It is located around the Elbe valley south-east of Dresden in Saxony, Germany, adjoining Bohemian Switzerland in the Czech Republic. Together with the Czech part, the region is known as Saxon-Bohemian Switzerland.

<span class="mw-page-title-main">Elbe Sandstone Mountains</span> Mountain range in Germany

The Elbe Sandstone Mountains, also called the Elbe Sandstone Highlands, are a mountain range straddling the border between the state of Saxony in southeastern Germany and the North Bohemian region of the Czech Republic, with about three-quarters of the area lying on the German side. In both countries, core parts of the mountain range have been declared a national park. The name derives from the sandstone which was carved by erosion. The river Elbe breaks through the mountain range in a steep and narrow valley.

<span class="mw-page-title-main">Liathach</span> Mountain in Highland, Scotland, UK

Liathach is a mountain in the Torridon Hills, in the Northwest Highlands of Scotland. It stands between Loch Torridon and the neighbouring mountain Beinn Eighe. The mountain is a ridge running east–west, with several peaks, and its upper half is made up of many steep rocky terraces. The highest peak is the Munro of Spidean a' Choire Lèith at 1,055 metres (3,461 ft) high. The other Munro peak is Mullach an Rathain at 1,024 metres (3,360 ft) high.

<span class="mw-page-title-main">Torridon Hills</span>

The Torridon Hills surround Torridon village in the Northwest Highlands of Scotland. The name is usually applied to the mountains to the north of Glen Torridon. They are among the most dramatic and spectacular peaks in the British Isles and made of some of the oldest rocks in the world. Many are over 3,000 feet high, so are considered Munros.

<span class="mw-page-title-main">Bastei</span> Rock formation in Germany

The Bastei is a rock formation rising 194 metres (636 ft) above the Elbe River in the Elbe Sandstone Mountains of Germany. Reaching a height of 305 metres (1,001 ft) above sea level, the jagged rocks of the Bastei were formed by water erosion over one million years ago. They are situated near Rathen, not far from Pirna southeast of the city of Dresden, and are the major landmark of the Saxon Switzerland National Park. They are also part of a climbing and hiking area that extends over the borders into the Bohemian Switzerland.

<span class="mw-page-title-main">Ústí nad Labem District</span> District in Ústí nad Labem, Czech Republic

Ústí nad Labem District is a district in the Ústí nad Labem Region of the Czech Republic. Its capital is the city of Ústí nad Labem.

<span class="mw-page-title-main">Tisá</span> Municipality in Ústí nad Labem, Czech Republic

Tisá is a municipality and village in Ústí nad Labem District in the Ústí nad Labem Region of the Czech Republic. It has about 1,000 inhabitants.

<span class="mw-page-title-main">Geology of Cape Town</span> Geological formations and their history in the vicinity of Cape Town

Cape Town lies at the south-western corner of the continent of Africa. It is bounded to the south and west by the Atlantic Ocean, and to the north and east by various other municipalities in the Western Cape province of South Africa.

<span class="mw-page-title-main">Teufelsmauer</span> Extending about 12 miles on Harz mountain range

The Teufelsmauer is a rock formation made of hard sandstones of the Upper Cretaceous in the northern part of the Harz Foreland in central Germany. This wall of rock runs from Blankenburg (Harz) via Weddersleben and Rieder to Ballenstedt. The most prominent individual rocks of the Teufelsmauer have their own names. The Teufelsmauer near Weddersleben is also called the Adlersklippen.

The Lusatian Fault, formerly Lusatian Overthrust, is the most important geological disturbance zone between the Elbe valley and the Giant Mountains. It is a fault that separates the granite of Lusatia from the Cretaceous sandstones of North Bohemia to the south. It is assumed that there was a fault throw of several hundred metres whereby the northern block was uplifted or upthrust relative to the southern block.

<span class="mw-page-title-main">Elbe Sandstone</span>

Elbe Sandstone describes sandstones that naturally occur in North Bohemia and those parts of Saxony within the area around Dresden. It is named after the River Elbe, which cuts through the sandstone region in a transverse valley, the Elbe Valley Zone. It reaches the surface most strikingly in the Elbe Sandstone Mountains, which are divided into the regions of Saxon Switzerland on German soil and Bohemian Switzerland on Czech territory. The term Elbe Sandstone is used in both geological and economic contexts.

<span class="mw-page-title-main">Wasgau</span>

The Wasgau is a Franco-German hill range in the German state of Rhineland-Palatinate and the French departments of Bas-Rhin and Moselle. It is formed from the southern part of the Palatine Forest and the northern part of the Vosges mountains, and extends from the River Queich in the north over the French border to the Col de Saverne in the south.

<span class="mw-page-title-main">Southern Sandstone</span> Rock formation in southeast England

Southern Sandstone is a local name for the Ardingly Sandstone of southeast England, a soft sandstone of Cretaceous age separating the Tunbridge Wells Sands from the overlying Grinstead Clay. The outcrops in the Weald of Kent are the rock climbing crags closest to London and are probably the most heavily climbed in the UK.

<span class="mw-page-title-main">Geology of Germany</span> Overview of the geology of Germany

The geology of Germany is heavily influenced by several phases of orogeny in the Paleozoic and the Cenozoic, by sedimentation in shelf seas and epicontinental seas and on plains in the Permian and Mesozoic as well as by the Quaternary glaciations.

The geology of Montana includes thick sequences of Paleozoic, Mesozoic and Cenozoic sedimentary rocks overlying ancient Archean and Proterozoic crystalline basement rock. Eastern Montana has considerable oil and gas resources, while the uplifted Rocky Mountains in the west, which resulted from the Laramide orogeny and other tectonic events have locations with metal ore.

<span class="mw-page-title-main">Temple of the Sun (Utah)</span> Summit in the American state of Utah

Temple of the Sun is a 5,822-foot (1,775-meter) elevation summit located in Capitol Reef National Park, in Wayne County of Utah, United States. This remote, iconic monolith is situated 12.5 mi (20.1 km) north-northeast of the park's visitor center, and 0.37 mi (0.60 km) north of Temple of the Moon, in the Middle Desert of the park's North District. Cathedral Valley was so named in 1945 by Charles Kelly, first superintendent of Capitol Reef National Monument, because the valley's sandstone monoliths reminded early explorers of ornate, Gothic cathedrals, with fluted walls, alcoves, and pinnacles. The free-standing Temple of the Sun towers over 400 feet above its surrounding terrain, which is within the Fremont River drainage basin. John C. Frémont's 1853 expedition passed through Cathedral Valley.