Gulf Coastal Plain


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Gulf Coastal Plain

 

a lowland in the United States and Mexico that borders the Gulf of Mexico.

The Gulf Coastal Plain, which merges with the Atlantic Lowland in the northeast, has widths to 350 km. Composed of a layer of marine sedimentary rocks measuring up to 6,000–10,000 m thick, the plain contains large deposits of oil and fuel gas (seeGULF OF MEXICO OIL AND GAS BASIN). There are elevations to 150 m, with the surface rising gradually from south to north and forming several parallel cuestas. The Gulf Coastal Plain is intersected by the valleys of several large rivers, including the Mississippi, Alabama, Brazos, and Rio Grande (Río Bravo del Norte). The shore is dotted with lagoons and numerous estuaries. Except in the tropical southwest the climate is subtropical. The average January temperature is 4°–8°C in the north and as high as 12° C on the coast; the average July temperature is 26°–28°C. Annual precipitation reaches 600–800 mm in the west and 1,200–1,500 mm in the east.

Red soils and highly fertile soddy-calcareous (on limestones) and soddy-alluvial (in river floodlands) soils are prevalent. Marsh soils are also widespread. More than a third of the territory is wooded. There are pine woods with dwarf palmettos in the underbrush and mixed forests of pine with evergreen oaks, magnolias, and myrtles. Along the rivers there are water tupelo (Nyssa aquatica), bald cypress, and poplar forests, and in the west there is savanna. Most of the plain is planted with cotton, but along the coast there are tobacco, sugarcane, and rice plantings. Subtropical fruits are also grown. The large port cities are New Orleans, Houston, Corpus Christi, Tampico, and Veracruz.

G. M. IGNAT’EV

References in periodicals archive ?
We chose these two parishes because they have good species lists (Hardy, 1979, 1982; Hardy and LeGrande, 1979; Wiedenfeld and Swan, 2000) and because, like the Big Thicket, they are in the West Gulf Coastal Plain.
Once scattered along the Gulf coastal plain from southern Louisiana east into Mississippi and Alabama, the stately four-foot- (1.
Bantam sunfish were collected from all major drainages within the Gulf Coastal Plain and Mississippi Alluvial Plain physiographic provinces of Arkansas, including the Arkansas, Ouachita, Mississippi, Red, Saline, St.
The region includes the Gulf Coastal Plain and the Lower Mississippi River Valley.
It should also be recognized that American black walnut is a very common hardwood species which ranges from the Great Plains to the East Coast and from the Central Lake States to the Gulf Coastal Plain.
The Atlantic and Gulf Coastal Plain of the United States, generally referred to as the southeastern Coastal Plain, is a broad region including physiographic areas, which are quite varied in geohydrologic conditions (Figure 1).
The park's 96 acres straddle two distinct ecological zones, the Gulf Coastal Plain and the Edwards Plateau.
fossilis (the nominate species) from the late Barstovian of the Gulf Coastal Plain of Texas (Holman 1977) and T.
Since pitcher plant bogs are rare--especially in this part of Louisiana--we undertook to preserve them and to gather information on their floristics and edaphics: information that adds to the growing body of knowledge about this plant community in the West Gulf Coastal Plain (Allen et al.
The primary area of attention is the Rio Grande delta, that part of the Gulf Coastal Plain marked by the Nueces River in southern Texas and the Rio San Fernando of northern Tamaulipas.

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