| Hole of Huesca
It is an ample depression, of flat bottom,
which it has been excavated by the hydrographic action in the contact
between the last calcareous series folded of the Pyrenees Outer Mountain
ranges (Gratal and Guara) and the soft tertiary horizontal cover that
filled up with materials, the Depression of the Ebro.
Towards the North, to little less than 10 Kms., limits the Mountain ranges; being already something
more towards the South where the Canteras de Almudévar (South-Western)
and the Mountain range of Alcubierre (Southe-Eastern) conclude their extension.
By the West, it gets to be confused with the Hole of Ayerbe, already in
near Gállego and Cinca rivers; whereas by the West, although something
blurred, continues being the course of Alcanadre river that marks the limits with the Somontano (Undermountains lands) of Barbastro.
The climate of the Hole
of Huesca is Mediterranean, with certain continental shade; with average
thermal values of 4,6º C. in January and 22,9º C. in July (amplitude of 18º C.);
the principles are equinoccial and the solsticiales minims. As far as
precipitations, they come to be around 551 mm. annual (there are exceptions).
The pluviometer maximum ones, correspond with the cyclone passage of polar
origin. In Winter, usually they appear the thermal investments, with frequent
Mediterranean Policultivation (grapevine, cereal, olive tree, fruit tree)
located very near to the Mountain ranges; whereas cereal cultivation
occurs more towards the South.
The vegetation, is in favor compound fundamentally of the rustic variety of oak, the holm oak (that are developed on brown grounds), the juniper, gayuba, tree strawberry and the lentisco. When the atmosphere is dry and sunny, the pine carrasco invades. A clarified garriga of coscoja abounds, the romero (rosemary), thyme, lavender
, etc.. .
The demographic phenomenon, by a great extent, has conditional that only a residual cultivation of the dry land bubsist (the almond tree), having left another residual cultivatión of the vineyard (today emergent) and the olive grove. Good part of that wheat field took step to the cereal cultivation (barley) whereas the irrigated land to expenses of the Isuela, Flumen and Guatizalema rivers, allows the elementary horticulture and of other species, like the maize and the rice.