Gibraltar Arc Gibraltar Arc The Gibraltar Arc is a geological region corresponding to an arcuate orogen surrounding the Alboran Sea, between the Iberian Peninsula and Africa. It consists of the Betic Cordillera (south Spain), and the Rif (North Morocco). The Gibraltar Arc is located at the western end of the Mediterranean Alpine belt and formed during the Neogene due to convergence of the Eurasian and African plates. Maximum altitudes of the region are reached at the Mulhacén peak (3482 m) at the Cordillera Betica. Precipitation is collected mainly by the Guadalquivir (Betics) and Sebou (Rif) rivers, which have delivered most sedimentary infill
South Bastion, Gibraltar "The centipedes and quadrantipedes are plenty, with a large hairy spider, which some say is the tarantula, and together with the grilia talpa, are inhabitants of the south bastion." One of the bastion's current uses is to house the Gibraltar College which sits on top of the bastion. A statue of Horatio Nelson stands below the South Bastion's wall, erected to commemorate the 200th anniversary of his victory and death in the Battle of Trafalgar (21 October 1805). The statue was designed by John Doubleday and shows Nelson as he was when he last arrived at Gibraltar. The sculpture was