Languages of Gibraltar were 326 people of Spanish nationality in Gibraltar, and a large number of ""Frontier Workers"" who commute there for work. Owing to its close proximity to Morocco and Algeria, the Berber language and Maghrebi Arabic are spoken by the Moroccan and other North African minorities in the city. In 2001, there were 961 Moroccans in Gibraltar. Hindi and Sindhi is also spoken by the Indian community of Gibraltar. Maltese, a language which was widely used in Gibraltar up until the late 19th century, and is still spoken by some families of Maltese descent. Similarly, Genoese was spoken in Catalan Bay
Rock of Gibraltar of dark bluish-gray, unfossiliferous shale, which is interbedded with thin layers of grit, mudstone, and limestone. It predates the Gibraltar Limestone. The Dockyard Shale Formation is an undescribed variegated shale of unknown age that lies buried beneath the Gibraltar's dockyard and coastal protection structures. Although these geological formations were deposited during the early part of the Jurassic Period some 175-200 million years ago, their current appearance is due to far more recent events of about 5 million years ago. When the African tectonic plate collided tightly with the Eurasian plate, the Mediterranean became a lake that, over the course of