Fergana Range is a mountain range in Tian Shan

Tian Shan

The Tian Shan , also spelled Tien Shan, is a large mountain system located in Central Asia. The highest peak in the Tian Shan is Victory Peak , ....

 in Kyrgyz Republic. The length of the range is 206 km, height up to 4893 m, and average height - 3600 m above sea level.

Geography

The Fergana Range stretches from north-west to south-east separating Fergana Valley

Fergana Valley

The Fergana Valley or Farghana Valley is a region in Central Asia spreading across eastern Uzbekistan, Kyrgyzstan and Tajikistan. Divided across three subdivisions of the former Soviet Union, the valley is ethnically diverse, and in the early 21st century was the scene of ethnic conflict...

 and Internal Tian Shan. The south-east section of the range is more elevated and it adjoins Torugart Ridge and Alaykuu Ridge through Seok Pass. South-west slope is long and low-sloped, and north-east - short and steep.

Geology

The Fergana Range is composed of schist

Schist

The schists constitute a group of medium-grade metamorphic rocks, chiefly notable for the preponderance of lamellar minerals such as micas, chlorite, talc, hornblende, graphite, and others. Quartz often occurs in drawn-out grains to such an extent that a particular form called quartz schist is...

, sandstone

Sandstone

Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...

, limestone

Limestone

Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

, and other sedimentary metamorphic formations ruptured by intrusions of gabbro

Gabbro

Gabbro refers to a large group of dark, coarse-grained, intrusive mafic igneous rocks chemically equivalent to basalt. The rocks are plutonic, formed when molten magma is trapped beneath the Earth's surface and cools into a crystalline mass....

 and diabase

Diabase

Diabase or dolerite is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. In North American usage, the term diabase refers to the fresh rock, whilst elsewhere the term dolerite is used for the fresh rock and diabase refers to altered material...

.