Plana (mountain) in the context of "Viskyar Mountain"

The Stolichna Municipality (Bulgarian: Столична община, romanized: Stolichna obshtina (also transcribed as Stolična obština), lit. 'Capital Municipality') is an obshtina (municipality) in Sofia City Province, Western Bulgaria.It is named after its administrative centre, the city of Sofia, which is also the capital of Sofia City Province and Sofia Province and the capital of Bulgaria as well.

The municipality is located mainly in the Sofia Valley, and also in the feet and lower parts of the mountains of Stara planina and Vitosha, Plana, Lozen, Rila. As of 2016, it was home to 1,500,927 inhabitants, of which 1,400,000 live in Sofia.

In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and compositions, illustrated by examples like the Palisades Sill of New York and New Jersey; the Henry Mountains of Utah; the Bushveld Igneous Complex of South Africa; Shiprock in New Mexico; the Ardnamurchan intrusion in Scotland; and the Sierra Nevada Batholith of California.

Because the solid country rock into which magma intrudes is an excellent insulator, cooling of the magma is extremely slow, and intrusive igneous rock is coarse-grained (phaneritic). Intrusive igneous rocks are classified separately from extrusive igneous rocks, generally on the basis of their mineral content. The relative amounts of quartz, alkali feldspar, plagioclase, and feldspathoid is particularly important in classifying intrusive igneous rocks.

Zavalska Planina (Bulgarian: Завалска планина) is a mountain range in Pernik Province, western Bulgaria, forming the westernmost part of the Zavalska–Plana chain of the Srednogorie mountain range system.

The mountain range spans in direction northwest–southeast for about 20 km; the width is 4 to 5 km. To the northeast the Yaroslavska Valley (964 m) connects it to the Viskyar mountain range and to the southeast a valley separates it from the Greben ridge of Viskyar. To the southwest the valley of the river Yablanitsa, a right tributary of the Erma, forms the boundary with the small mountain ranges Ezdimirska Planina and Strazha of the Kraishte region, while a 878 m saddle links it to Lyubash. To the northwest a 971 m saddle connects it to the mountain range of Greben.

Lyulin (Bulgarian: Люлин) is a mountain range in western Bulgaria with an altitude of 1,256 meters above sea level. It is part of the Srednogorie mountain system that from west to east includes the mountain ranges of Greben, Zavalska Planina, Viskyar, Lyulin, Vitosha, Plana and Sredna Gora. Lyulin Peak on Livingston Island in the South Shetland Islands, Antarctica is named after it.