The Leningradskaya (C-7) cave, located in the Pinezhsky district of the Arkhangelsk region on the banks of the Sotk river on the territory of the Pinezhsky nature reserve , is one of the largest caves of the Pinego-Kuloi karst area both in the length of its passages and in the total volume of underground cavities and the size of underground halls . In length - 3.6 km, second only to the Constitutional Cave (5.7 km) [1] .
| Leningradskaya cave | |
|---|---|
| Specifications | |
| Length | 2970 m |
| Volume | 56 480 m³ |
| Year of discovery | 1966 |
| Host rocks | limestone |
| Visit | |
| Visible to visitors | The territory of the reserve m |
| Location | |
| A country |
|
| The subject of the Russian Federation | Arkhangelsk region |
Description
The cave is practically one long gallery of variable cross section, along the bottom of which a stream flows. A detailed description is given in the collection “The Pinego-Severodvinsk karst region caves” in the article “The Leningrad Cave” (by I. V. Kozyrev, I. I. Saenko, V. M. Golod) [2] .
Study History
The Leningradskaya cave was discovered in the summer of 1966 by the first Pinezhskaya expedition of Leningrad speleologists led by V.N. Tanasiychuk. The second Pinezhskaya Expedition led by Golyanova E. V. in the winter of 1967 did a topographic survey of 1600 m of its moves, but its further passage was impossible due to the lack of wetsuits .
Difficulty passing the cave
The first difficult section begins in the first landing hall from which a very low manhole along the stream leads to the Penguins hall. From 1600 meters wetsuits and the ability to overcome low siphons swimming on the back are required.