The most serious is melanoma. Like all body tissues our skin is made up of cells: basal cells, squamous cells and melanocytes. Skin cancer types are named after the skin cell in which the cancer develops: basal cell carcinoma, squamous cell carcinoma and melanoma.
Pichilingue Harbour, La Paz, Baja California, Mexico. History. Although the city was officially founded in 1535, its area had been known by hunter and gatherer peoples since Neolithic times. Rock paintings and other artifacts dating as far back as 10,000 years ago attest to their presence in most regions of the Baja.
Founded in 1849, the city was renamed Ciudad Porfirio DÃ­az in 1888, in homage to President Porfirio DÃ­az. It reverted to its original name following the Mexican Revolution. In Spanish Piedras Negras translates to black stones â a reference to coal deposits in the area. Across the river, coal was formerly mined on the US side at Dolchburg, near Eagle Pass. This mine closed around 1905, after a fire.