ANALYSIS OF A TOPOGRAPHIC PROFILE

A topographyc profile is the graphyc representation of the relief of an area, obtained by cutting transversaly the contour lines of a topographyc map. In this case the line that cut transversaly goes from Lisboa to the Pirinies and the gulf of Leon.

My line also cross the stuary of the river Tajo, the Central System goin near the north and south plateau, the Iberic System, the depression of the river Ebro and finally goes to the Pirinies and the gulf of Leon.

Now we are going to analyce the places that cross my line. I´ll start with the stuary of the Tajo.
The estuary of the river Tajo was formed by these river when, in the Era Terciaria/Cenozoico. In this period of time the plateau changed his inclination from the Mediterranean Sea to the Atlantic Ocean doing that the river flew to this Ocean. Also the number of years that the river have been there had did that the Tajo had depositated many remains at the sides of it giving fértil areas and a zone in form of U.

The central system was created when the Macizo Hespérico apear because below it a pit was picking up sediments and with the passage of the years this sediments will elevate big mountains that would get step to the Central system. Now is the most elevated mountain system of the península. Also it have many important mountain ranges that are: Somosierra, Gudarrama, Gredos, Peña de Francia and Gata.


The Iberic system was formed very similar like the central system. When apear the Macizo oF Aquitania, Ebro and Catalano-Balear, a pid was farmed below they and this pit get up sediments and with the time it eleved getting step to the Iberic system. It have many mountains ranges that are very important like:La Demanda, Moncayo and wiht a considerable hihg Picos the Urbión with 2235m.

The depresión of the Ebro is a depresión below the Pirinies in wich flows the River Ebro. It was formed in theEra Terciaria/Cenozoico when the big Mountain Systems apear, like The Pirinies. In this case, when the Pirinies apear, below they was formed a depresion. Many years later riber Ebro will flow across this depresion creating a big fértil area of groun at the sices of the river.

The Pirinies is the mountain system with the highest mountain of the península. It was formed in the Erogénesis Alpina when also were formed the Alps. They have been over the years a natural defense to the civilizations that were in the península amond the years. They have a complex estructure formed by the axis, the prepirinies and the middle depresion. The most highest mountains in the pirinies are near the axis like can be Aneto and Monte perdido. Also the Pirinies has two prolongations that are Montes Vascos and Cordillera Costero-Catalana.