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Description
Panoramic view of 180 ^or the city of Barcelona in a southerly direction. In the background you will see the mountain of Montjuïc. To the northeast, the hill of La Rovira, also known as the Hill of the batteries, is seen partially, where there are the remains of the antiaircraft batteries of the Spanish Civil War. This hill, along with the upper part of Barcelona, ​​belongs to the Collserola mountain range, which is part of a larger-sized relief unit called Litoral Serralada.

The relief gradually eases towards the plain of Barcelona and becomes practically horizontal near the sea. The hill of Montjuïc, slightly raised, draws attention, despite being close to the sea.

The eye of the geologist
The Rovira hill is formed by calcareous rocks of the Devonian age (Paleozoic 420 - 360 million years). These rocks are hard and make marked reliefs. The relief gradually eases towards the plain of Barcelona, ​​which is made up of rocks of much younger age (Miocene-current affairs).

We can help you with a geological cut to interpret this landscape. The geological cuts combine observable surface and subsoil information and allow a reconstruction of the geological structure in depth. From the vantage point of Joan Sales you can make a cut in a northeastern direction - southeast to Montjuïc. The cut helps to see the sharp slope change between the high parts of the Sierra de Collserola, the hills such as the Rovira or Carmel and Montjuic and the plain.

History and interpretation
The relief of the upper part of Barcelona and the Collserola mountain range was formed by the action of parallel faults on the coast line (in the northeastern-southwestern direction) that sank the plain of Barcelona and the blocks of the Vallès- Penedès. These faults have a neogeneous age (approx 15 M) and stagger the city from the mountains to the sea. In the raised blocks of the upper part of Barcelona, ​​older rocks and on the plain of Barcelona emerge more modern rocks due to the erosion, transport and sedimentation of materials from the highest adjacent reliefs.

The mountain of Montjuïc is formed by materials of neogene age. Looking to the sea is limited by a steep cliff, while towards the ground the relief makes a gentle descent. The cliff represents a fault with a southerly direction, of the same family that limits the Catalan coast.

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