The ridges and peaks of the Gorgani are covered with seas of sandstone boulders and are, therefore, difficult of access. The light gray Yamna sandstone, of great resisting power, appears in this mountain section in very thick [30]layers, and is the cause of the greater height and the bolder forms which, in places, are suggestive of high mountain ranges. The energetic weathering process, aided by the cover of winter snow, breaks up the mighty sandstone layers into great rocks, boulders, fragments and rubble. Deep fissures yawn between moss and lichen-covered boulders, many boulders rock under the foot of the wanderer, and many of them, thru caving-in and thru accumulation, have formed natural chambers and hollows. The rocky ridges, covered with seas of boulders, are Arshizia, the Gorgan peaks, whence comes the name of the entire mountain range. The seas of boulders and rubble-stone are called Zekit or Grekhit. In the highest groups of the Gorgani Range (especially in the Svidovez) are found also distinct traces of the glacial age, glacial excavations with small lakes or with swamps that have taken the place of lakes. A splendid, only slightly thinned dress of virgin forest covers the Gorgani Chain. The lower forest section is composed of beech, ash and fir trees, the upper part of pines and stone-pines. The tree limit is very irregular and vascillates between 1100 and 1600 m. Mountain pastures are very rare, because of the seas of boulders and rubble-stone, but there are large and beautiful, tho not easily accessible, stocks of mountain pines.