Aksamitova gate or also sometimes called Axamit´s gate is the biggest rocky gate of Český kras.
In the past this natural formation has been for a long time considered to be a torso of a cave. But today it shows up to be rather enhanced crack because the space is formed in powerful vein of coarsely crystalline calcite. Apparently it is a karsted hydrothermal corrosion cavity. From original form of a crack has remained retained only the rocky gate. There was created opened space with vertical walls without a ceiling and with plan 10 x 13 meters. At the bottom Axamit´s gate is divided cave which is 16 meters long. Between 1834 and 1986 there have been several archeological researches.
The walls are made up of gates Koněprusy Prague limestone strata. The local limestone formed in the older Palaeozoic, when it was in this area a tropical sea. Formed from calcareous marine invertebrates boxes before about 400 million years ago.
South wall KOTYZA a typical karst morphology. Here and resemble the shape of an elephant's head. There was described kotýských limestone facies are stratotype kotýských limestone.
Here we see the concept stratotype, which is a typical standard outcrop stratigraphic unit or stratigraphic boundaries. Serves to preserve stability concepts and definitions. Stratotype are determined and approved by the International Commission on stratigraphy (International Commission on Stratigraphy), which is part of the International Union of Geological Sciences (International Union of Geological Sciences).
Duration of the stratotype geologists were determined in the Lower Devonian. Time is defined boundary 416 ± 2.8 million years ago to 400 ± 2.5 million years. The lower boundary is based on guided graptolitové zone Monograptus uniformis and international stratotype is at outcrop loaves at Suchomasty (Resolution of the 24th International Geological Congress in Montreal 1972).Gate to hell isn´t the only interesting object in this area. In very near proximity you can optionally visit Jelínkův most and Děravá jeskyně.
Jelínkův most is double rock bridge overcoming almost nine meters deep fissure space with sloping bottom in the southern part of Kotýz. It is karsted about 1 m thick calcite vein. Probably it’s formed on the same calcite vein structure as the cave Ve vratech.
Leaky cave has a major portal at the southeast edge of the platform Kotýza. This is a significant archaeological location. It has been studied in the 20th years by J. Axamit and in the years 1951-1958 by F. Prošek. The largest findings belong to the younger Paleolithic, Magdalenian, including the famous engravings of ibex on the slate plate. From the younger cultures are here represented Neolithic (ceramic Stroked) and several fragments of burial.