Puerto Rico, officially the Commonwealth of Puerto Rico (Spanish: "Estado Libre Asociado de Puerto Rico", is a semi-autonomous territory of the United States located in the northeastern Caribbean, east of the Dominican Republic and west of the Virgin Islands. The territory is composed of an archipelago that includes the main island of Puerto Rico and a number of smaller islands and keys, the largest of which are Vieques, Culebra, and Mona. The main island of Puerto Rico is the smallest by land area but third largest by population among the four Greater Antilles (Cuba, Hispaniola, Jamaica, and Puerto Rico).
Puerto Ricans often call the island Borinquen, from Borikén, its indigenous Taíno name. The terms boricua and borincano derive from Borikén and Borinquen respectively, and are commonly used to identify someone of Puerto Rican heritage. The island is also popularly known as "La Isla del Encanto", which translated means "The Island of Enchantment." Puerto Rico consists of the main island of Puerto Rico and various smaller islands, including Vieques, Culebra, Mona, Desecheo, and Caja de Muertos. Of the latter five, only Culebra and Vieques are inhabited year-round. Mona is uninhabited most of the year except for employees of the Puerto Rico Department of Natural Resources. There are also many other even smaller islands including Monito and "La Isleta de San Juan" which includes Old San Juan and Puerta de Tierra.
Puerto Rico has an area of 5,325 sq mi (13,790 km²), of which 3,425 sq mi (8,870 km²) is land and 1,900 sq mi (4,921 km²) is water. The maximum length from east to west, from Punta Puerca to Punta Higuero, is 110 miles (180 km), and the maximum width from north to south, from Isabela to Punta Colón, is 40 miles (64 km). Puerto Rico is larger than Delaware and Rhode Island combined, but slightly smaller than Connecticut. It is mostly mountainous with large coastal areas in the north and south of the main island. The main mountain range is called "La Cordillera Central" (The Central Range). The highest elevation in Puerto Rico, Cerro de Punta (4,390 feet; 1,338 m), is located in this range. Another important peak is El Yunque, one of the highest in the Sierra de Luquillo at the El Yunque National Forest, with an elevation of 3,494 feet (1,065 m). The capital, San Juan, is located on the main island's north coast.
Geology
Puerto Rico is composed of Cretaceous to Eocene volcanic and plutonic rocks, overlain by younger Oligocene and more recent carbonates and other sedimentary rocks. Most of the caverns and karst topography on the island occurs in the northern region in the carbonates. The oldest rocks are approximately 190 million years old (Jurassic) and are located at Sierra Bermeja in the southwest part of the island. They may represent part of the oceanic crust and are believed to come from the Pacific Ocean realm.
Puerto Rico lies at the boundary between the Caribbean and North American plates and is being deformed by the tectonic stresses caused by their interaction. These stresses may cause earthquakes and tsunamis. These seismic events, along with landslides, represent some of the most dangerous geologic hazards in the island and in the northeastern Caribbean. The most recent major earthquake occurred on October 11, 1918 and had an estimated magnitude of 7.5 on the Richter scale. It originated off the coast of Aguadilla and was accompanied by a tsunami.
The Puerto Rico Trench, the largest and deepest trench in the Atlantic, is located about 75 s (120 km) north of Puerto Rico in the Atlantic Ocean at the boundary between the Caribbean and North American plates. It is 1,090 miles (1,754 km) long and about 60 miles (97 km) wide. At its deepest point, named the Milwaukee Deep, it is 27,493 feet (8,380 m) deep, or about 5.2 miles (8.38 km).
Climate
Located in the tropics, Puerto Rico enjoys an average temperature of 82.4 °F (28 °C) throughout the year. The temperature does not change drastically with a change in season. The temperature in the south is usually a few degrees higher than the north and temperatures in the central interior mountains are always cooler than the rest of the island. Hurricane season spans June to November. The all-time low in Puerto Rico has been 40 °F (4 °C), registered in Aibonito.
Puerto Rico has 17 lakes, all man-made, and more than 50 rivers, most originating in the Cordillera Central. Rivers in the northern region of the island are typically longer and of higher water flow rates than those of the south, since the south receives less rain than the central and northern regions.
Fauna
Species endemic to the archipelago are 239 plants, 16 birds and 39 amphibians/reptiles, recognized as of 1998. Most of these (234, 12 and 33 respectively) are found on the main island. The most recognizable endemic species and a symbol of Puerto Rican pride is the Coquí, a small frog easily identified by the sound of its call, and from which it gets its name. Most Coquí species (13 of 17) live in the El Yunque National Forest, a tropical rainforest in the northeast of the island previously known as the Caribbean National Forest. El Yunque is home to more than 240 plants, 26 of which are endemic to the island. It is also home to 50 bird species, including one on the top 10 endangered birds in the world, the Puerto Rican Amazon. Across the island in the southwest, the 10,000 acres (40 km²) of dry land at the Guánica Dry Forest Reserve contain over 600 uncommon species of plants and animals, including 48 endangered species and 16 endemic to Puerto Rico. |
