Carrillo is a canton in the Guanacaste province of Costa Rica. The head city is in Filadelfia district. Toponymy The name of the canton is in honor of former head of state Braulio Carrillo Colina. History Carrillo was created on 16 June 1877 by decree 22. In the 18th century a group of Ladinos settled on the west bank of the middle Tempisque River, where there was a grove of trees called "sietecueros" (Lonchocarpus costericensi), giving rise to the population that corresponds to the city of Filadelfia, head of the canton. In Executive Decree No. 22 of June 16, 1877, Carrillo was declared a canton of Guanacaste province. The oldest population of the canton is Sardinal, proof of this is the mention of the place made by Brother Don Antonio Muñoz, following his visit in late 1794 for a collection of handouts that he performed in several villages of Guanacaste. In the 1830s, the residents of neighborhoods of Sietecueros and Sardinal, asked the then Head of State, Braulio Carrillo Colina, to be separated from the village of Santa Cruz and to be incorporated into Guanacaste City (now Liberia) in a civil and ecclesiastical way, this request was received when it was issued the Decree No. 5 of February 23, 1839. In the school division in 1886, Sardinal was selected as the second school district of the canton in Law No. 60 of August 9, and Filadelfia was selected as part of the first school district. The main high school (Colegio Técnico Profesional Agropecuario, Agricultural Vocational Technical High School) began his teaching activities in 1965, during the administration of Francisco Orlich Bolmarcich. Geography Carrillo has an area of km² and a mean elevation of metres. The canton is shaped like a boot, with the Pacific Ocean at the top. The Tempisque River decorates the front of the boot from top to toe. The Cañas and Bolsón rivers provide the heel and sole of the shape. The canton borders with Liberia to the north, Santa Cruz to the south, Bagaces to the east and Pacific Ocean to the west. Geology Carrillo is geologically constituted of materials of the Cretaceous, Tertiary and Quaternary, being Quaternary sedimentary rocks that dominate the region. Cretaceous rocks are volcanic sedimentary and intrusive. Among the materials of the Tertiary period, are sedimentary rocks of the Paleocene Eocene period, which corresponds to the formation of Barra Honda. In Quaternary